Just decided to read through it anyway, as I have some free time. Going to go point by point.
I would agree with this IF the point was that just kata is not enough. But karate also can do pad work, heavy bag work, and full contact sparring. Just because it does kata does not negate any of those things.
Again, Karate can do full contact sparring. And point sparring has a time and place as long as its not all that's being done.
Blatantly incorrect. I have never once heard any of my karate friends say you stop your fist at the target. The idea is always to push through or behind the target (true for friends of any martial art actually).
True, if the person does not practice full contact. But, it's a habit that gets fixed very quickly when switching to full contact, so it's not a huge deal IMO.
I'm going to refer to Gerry's comment about finding the exception in muay thai but not in karate (ignoring the idea that for some reason karate kicks are less powerful than muay thai without any evidence to back it up).
Because Thai boxers specialize in sweeps? As far as I know, both will have difficulty grappling with an art that focuses on grappling (unless it's a style of karate that spends a lot of time on grappling), so I'm not sure that can really be used against karate in favor of MT.
I'm not even a karateka, but every single point made about why muay thai is better is questionable.