Why would anyone be the perfect player with the solution to everything? You're an cog, an imperfect one with strengths and weaknesses, in a machine with 15-20 other oddly mismatched cogs, that's simultaneously fighting another machine with 15-20 oddly mismatched cogs of their own, both lead by GMs that then have to deal with the even trickier dynamic of deciding how to organize those cogs. You can have all the TPE in the world but it doesn't change the fact that everything about what you do on the ice is affected by what the other 11 guys on the ice are trying to do, and are good or bad at doing.

That's exactly how it is in the real world- the difference is those are organizations worth hundreds of millions of dollars with centuries of combined staff experience and institutional memory who get paid to figure out how to build, adjust, and find chemistry in those teams, and we're a bunch of people on an internet forum with a bit of free time. If you found something that worked perfectly all the time (and it'd have to be at both an individual level and a lines organization level), everyone would go straight for the perfect builds, and then we really would have a random crapshoot separated only by player TPE.