I have seen 1400 FIDE elo(much much stronger than chess.com 1400) players make illegal moves in real life long time control tournament games after thinking for

I have seen 1400 FIDE elo(much much stronger than chess.com 1400) players make illegal moves in real life long time control tournament games after thinking for over 10 minutes. People regularly create an erroneous board state in their head while thinking. This is often how blunders happen; merging together a possible future board state with the current one. Illegal moves are more rare because you have to then also miss that the move is illegal while physically making it. But they do happen. 1400s on chess.com never play illegal moves. 300s on chess.com never play illegal moves. Because it's impossible to do. In the real world, even grandmasters can make illegal moves, though they almost always have to be under time pressure. This idea that the illegal moves completely invalidate this result is just ill-conceived. On the other hand I do agree this is mostly returning common sequences of moves. And if you actually analyse the games, especially the ones with illegal moves, you'll find plenty of qualitative evidence of that. But I'm fed up of doing people's thinking for them for today, so this is peace out for me today. See my others comments on this post to see a more detailed analysis of what this is doing.