I guess that's an open question that the community will decide. I can't speak for anyone in particular, but if you watch live streams of fractal, bluescuti, etc. their primary drive seems to be to have more game to play, not less. They already go far beyond the 'max' score that the UI can display. For them to "beat" Tetris is to play so long that there's no more game left to play not just to get the biggest number.
Relatedly, this is why zfg, a famous (debateably the best) Ocarina of Time speedrunner, doesn't do Any%, and has also opted out of the 100% category. He'd rather play the game than not play the game.
