Like anything else you can take it to extrems.. In my own experience you don't have to go to those extremes to see the benefits. But some people do, just to see how far they can take it. Like lifting weights. Most people get good results and have good benefits from it., then there are guys like this. Is it worth it? They think so. If you don't like it, don't do it. Lots of people think martial arts in general is stupid. Spending thousands of dollars and a life time of training for a theoretical fight you will never have.
Best not to judge others.