Because of ufc fanboys who don't understand anything else. Yes jiu jitsu was very effective against every style in 1993 but look at Gracie vs Hughes same weight and Hughes style was wrestling so it should be easy for Gracie to sub him but he never tried 1 submission. Basically the sport passed him by. All the old ufc and those videos of Gracie were against people who'd never heard of jiu jitsu these days people know the style even if you never trained you know what an arm bar is or a triangle. All the talk about striking being useless is nonsense look at the ufc stipe miocic is a former boxer, Jon jones was originally a wrestler but most of his success is due to his striking now, robbie lawlor a straight up brawler, connor mcgreggor a striker with awful wrestling and jiu jitsu, Dominic cruz former wrestler but mainly strikes these days. All ufc champions where striking is their base
Also plenty of former champs as strikers bas rutten, chuck liddel, rampage Jackson, forest griffin, shogun, lyoto machida, Anderson silva, anthony pettis all people who have had great success with striking backgrounds
This is about as biased of a post as one can possibly make here, the number of “inconvenient-to-your-narrative” factors that you’ve conveniently omitted is staggering.
First of all Gracie vs. Hughes. Hughes has stated multiple times that during his title run he trained no gi jiujitsu with Jeremy Horn - who was mostly a no gi jiujitsu guy. Hell, in the very post fight interview of the fight when asked if he was afraid of Gracie’s submissions, Hughes said “not really, I train with Jeremy Horn everyday and he’s one of the best submission guys out there”. Additionally, Hughes is a lot stronger, faster, and better conditioned than Royce was in his PRIME. In this fight Royce was 40 years old and hadn’t had a high level fight in about 6 years.
Second, who the hell is saying striking is useless? The closest I’ve heard to any legit MMA fighter saying that is “striking is useless against a grappler if the striker isn’t a good grappler himself”, which is entirely true. But that’s a far cry from saying “striking is useless”. Unless you’re specifically criticizing the .001% of the dumbest mma fans out there, this is a horrible strawman argument.
Every single one of your examples are seriously biased. You conveniently left out that Stipe Miocic was a Div 1 wrestler, which is a WAY higher wrestling achievement than anything he achieved in boxing. Jon Jones succeeds in striking because his wrestling is good enough to keep/take the fight wherever he wants. Without his grappling he would be getting taken down and choked out in the first 30 seconds against every single opponent he faced, this is very basic knowledge about MMA btw. For an example of this check out Stefan Leko’s success (or lack thereof) in MMA, he is a far superior striker compared to Jones, yet he kept getting taken down and submitted by little japanese pro wrestlers because of his lack of wrestling/jiujitsu. Lawler is not a straight up brawler, he was a straight up brawler in 2002-2004 when he was getting beat up by every well rounded guy he faced, now that he’s a well rounded guy himself he’s a bamf. Tank Abbot is a straight up brawler, and the differences between he and Lawler are obvious. Conor McGregor does not have awful jiujitsu, he’s a brown belt under John Kavanaugh. No, he isn’t world class but he isn’t “awful” either. And of course the same logic that applies to Jones also applies to Cruz. Without their grappling ability they would be nothing, they would fare no better than the TMA guys with no ground game from back in UFC 1-7 ish
On your former champs…two of the guys you say have a “striking” background actually have a wrestling background and refined their striking as they went, 4 of them are bjj black belts (one more on top of that is a brown). Then you have Bas Rutten, who does have a striking background, this is true. However, it’s also true that the man himself will tell you (as he has stated multiple times) that all of his early career failures were due to a lack of grappling, and after getting taken down and submitted in 30 seconds against Ken Shamrock he began obsessively training his grappling. And after his grappling became on par with his striking…he became a world champion.
And this is all without even taking into account all of the rules that the athletic commission had to add in order to make it so that the grapplers weren’t just killing everyone so that the strikers actually had a chance in order to make it more entertaining and draw larger crowds (mandatory gloves, referee standups, referee clinch breaking, mandatory rounds which = free reset every 5 minutes, 3-point ground striking rule which completely fukks the old school vale tudo open guard, etc all greatly benefit the striker).