Samart is a curmudgeon with a "it was better in my day" attitude.
https://m.youtube.com/channel/UCeKzVb2vff_pRr1tdyHP9uw
https://m.youtube.com/channel/UC7nYaIZTYYgqECTbRaXFA4A
Watch fights from the 70's and 80's and you'll see the structure of the fights were largely the same as they are today -- clearly gambling influenced. And why wasn't gambling ruining the sport in the "golden era" when the biggest gym bosses were being murdered? The gambling reliance in the sport isn't ideal, but it's a tired talking point. If someone wants to find a reason for why "it ain't what it used to be" they can easily find it (electronics, social media, soccer etc.) without bringing up gambling.
ONE is a fly-by-night promotion, which means they have no infrastructure. The sport of Muay Thai (in Thailand) is not a promotion and does have infrastructure. Thankfully your sadistic dream won't come true.
Edit: Gambling this, gambling that: how often do you see a great Muay Thai fight outside of the Thai circuit? The best fights and fighting are still there.