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I’ve never heard of that being used to steal a password—for one thing, it wouldn’t reveal the order in which you pressed the keys, so it would still leave n! possibilities (24 possibilities for a 4-digit pin, or 40,320 for an 8-letter password). And in any case, if someone were to examine the keys afterward, it’s more likely they could see which keys you wiped if you just wiped the ones you used (and if you wiped all of them, it would make it easier to steal the password of the next user).
The bigger thing to worry about is a hidden camera recording your key presses—and to counter that, I position my fingers over all the keys I’ll use and then move all my fingers with each press, so it’s harder to see which key was key was actually pressed.
The only case I would imagine someone trying to guess/brute force the PIN using fingerprints is some sort of state level actor trying to gain access, e.g. during a search warrant