i think most people in high level and professional combat sports community would say the real root cause here is MMA (specifically UFC). the internet has certainly accelerated its influence though, and given it a reach that payperview and video tapes could never have facilitated.

basically, there's only a small handful of martial arts that actually work in applied person-to-person combat without weapons. and they're all largely useless in the real world when faced with multiple opponents and/or weapons. critically, you must know all or most of these skills or else you will get taken advantage of. mma has proven that it's basically western wrestling, BJJ (which draws on judo), muay thai and kickboxing, western boxing, and most importantly, an insanely rigorous cardio and strength training program that will allow you to last even a few seconds in the ring with a real fighter.

and even then... you could get your ass knocked out in literally 2 seconds. see: mcgregor. that isn't to say it won't change in the future, but that's basically where it is now.