[Please keep the site friendly and free from abuse; DS]
People shouldn't be allowed to take advantage of their opponent's obvious mouse slip.

don't pay attention to regalbeginning. ik what you're talking about misclicks hurt but that's a part of chess I wish chess.com added a way to handle misclicks or add a takebacks future.
Yes, this is the only thing Lichess does better than Chess.com. Confirm move. It sure does come in handy, let me tell you!

OTB chess by FIDE rules is extremely punishing on slip-ups.
If anything, chess.com is soft compared to FIDE rules.
The rules are fine as they are.

don't pay attention to regalbeginning. ik what you're talking about misclicks hurt but that's a part of chess I wish chess.com added a way to handle misclicks or add a takebacks future.
Yes, this is the only thing Lichess does better than Chess.com. Confirm move. It sure does come in handy, let me tell you!
You can confirm moves on chess.com, you just need to change your settings.

Misclicks are, unfortunately, a necessary risk when playing online chess.
This is not an unusual circumstance, though. Every player who plays long enough will suffer losses due to situations like this. Your opponent has certainly suffered losses in the past from the same kind of thing.
Shrug and move on to the next game. In the grand scheme of your chess-playing life, this is a minor hiccup.

I mean, it's kind of a thing on your part too. And honestly, no one at the other side of the screen would know whether it was a misclick or if you were just not insightful enough as to see said blunder. If it was a game in real life, and you did the same move, it would be completely valid for your opponent to take advantage of you in the same position. So, my honest opinion is that as far as technology goes, there is still a long way to go, and these losses shouldn't count as much as losing due to a blunder would count to you.

The USCF rules explicitly address the analogous OTB situation:
10G. Accidental release of piece.
A player who deliberately touches a piece and then accidentally releases it on an unintended but legal square is required to leave it on that square.

Real fair, you know. They should also give you their firstborn. Throw in a car.

I'm just playing around Kiefer. But if u want to eliminate those mouse slips & still want to play blitz then just add an increment to the time control, maybe 2 or 3 seconds. That'll give u enough time to be careful & double check. Ur only mouse slipping because ur forced to rush.
This is a game I played a long time ago (yeah, i'm kinda embarrassed by some of the moves...) in which I accidentally clicked the wrong square and hung my rook instead of taking the free queen.