I just realized something about the speedrunning community. First let me say, that I truly admire the dedication, talent, and skill that is on display with their community. Many of their records are much, much harder to break than our Arcade/MAME game records. The record times are truly an art form.
Having gotten that out of the way, I can focus on what I see as the major flaw.
It's all about execution. The games they play are rather predictable. The randomness usually doesn't have the player make difficult choices.
Basically it's all about execution of very hard moves. To master these moves is amazing, but in the end it becomes monkey see monkey do type play.
Yeah, I get it in our own community we also have games that are 100% about execution. And to be honest, execution is vital for a world record on almost any Arcade/MAME game. Still, usually there are difficult choices that the player needs to make on the spot. One wrong move, and it's instant death despite the great execution.
So in that way I feel that most Arcade games have a much fairer balance of execution, and think for yourself play.