I'm not very good, about 860 (for now) at Blitz and 1050 for Rapid. A typical accuracy score for the winner is often 80+, and yet when I look at accuracy scores for the winner for 2000-2200 rated players they are often the same! And more than a few of the losers at these higher levels have accuracy scores in the 70s ... same as at my level (although at my level we do see a lot of scores much lower, sometimes even for the winner).
Is this because their games are more complicated? If I have an accuracy score of, say, 88 (which does happen), does that mean I played like a 2000 that game? One final note: During his ratings climb series in YouTube, Nelson Lopez often had accuracy scores that were in the 80s against low rated opponents, sometimes even in the 70s. In any event, it makes me feel better to see 2000s with their fair share of inaccuracies, mistakes and even blunders.
Oftentimes the accuracy decreases if a game is more complex. If you’re playing high accuracy games, it may be that you’re trading a lot of pieces or the positions are just easy to play. When higher level players play lower rated games, it’s normally because the position is really complex and has more things to miss. In terms of examples - imagine you trade all your pieces off immediately at the start and agree to a draw - you might’ve played at 95%+ but you were never really playing for a win. Instead, you might play opposite side castled positions and have some all-or-nothing attack where both you and your opponent are missing key moves and the accuracy is lower as a result.