There are tactical implications of style. In other words, it impacts your decision making. It impacts your understanding of range and timing. It impacts the attributes that you believe are important to develop and the manner in which you understand physical altercations
This is not to mention the myriad of physical differences which differing styles present.
I can see where you are coming from, but I disagree. I'll try to take each point in turn because your well thought out answer deserves a detailed response.
1. Tactical implications, such as decision making.
Yes, I totally agree. Style does affect decision making. If I am a karate guy I'm almost never going to chose to shoot for a double leg takedown where I might if I'm a jujitsu guy.
But, how do I go from Joe Nevertrained to expert karate fighter?
I train. There's nothing else to it but training.
So stylistically I'm encouraged to go for x technique over y technique.
How do I land technique x? How do I set it up? How do I know when I should go for something different because it's not safe?
Training.
Because even if your style comes with a book of theory explaining when and why to do x, y and z techniques, good training will illuminate any flaws in those theories.
You see, this is how I know guys like drop bear are just clinging to this idea of style relevance in order to have something to bash: in a different conversation my argument is their argument.
Train with hard contact to work out what works and what's b.s..
Well if you do that but keep an analytical mind, your not just going to throw stuff out, you are going to learn what you need to do to hit with a short punch or to take someone's balance with aiki principles etc.
It's a natural progression of their same message.
2. Style impacts the attributes you choose to develop.
Again, completely agree. Style influences your specialisms.
How do you execute a specialism like ground fighting? You train to get into position and deal with obstacles and counters and to develop the attributes you need to pull it off. If your training is lacking you won't be successful.
Training is still the decisive factor.
3. The manner in which you understand physical altercation.
This I disagree with. It may affect how I view my tactical options, because I only have the options I've developed in training. But Understanding is down to experience. Again how much I've been exposed to through my training.
Can you argue that individual styles offer limited training experiences due to having classes filled with people doing the same thing? Sure. But it's up to the teacher to improve the breadth of your training. It's not a weakness of the system of fighting.
4. Physical differences. I'm not sure what exactly your referring to, can you elaborate.