because they are hanging on to old outdated traditions instead of doing what the fans and players themselves want. To go deep into it its because old people can't think as fast and are sore losers over getting flagged when in winning positions so they brainwash the youth to feel the must resign matches and play classical.
Chess wasn't meant to be a spectator sport, though. When trying to get spectators, then blitz and bullet is gold - but in terms of over-the-board, nobody's streaming it, nobody's donating, etc... You just go and play your best game. It doesn't really have anything to do with sore losers. The standard FIDE time control usually has 30 second increment, so nobody gets flagged.
I remember in the 90+30 SD/30 tournament I played in a couple weeks back, the TD said "you must always record, no matter how low on time you are... there is no such thing as time pressure with the 30 second increment".
Anyhow, this is a perfect opportunity for some high rated pillock to berate me for thinking a move of mine could be better than a move of a GM. Perhaps you know which one I have in mind. I wouldn't wish to deprive him, or anyone else for that matter, of the joy of being unpleasant and stupid.
What the ???? are you talking about man ?? You was doing pipi in - wait, I'm not old enough to make that joke.
Also, I learned a new word. Pillock. I guess I can use it to insult my friends.