I am not your downvoter, but after upvoting on my phone a few times I started to realize it wasn't really clear whether my fat finger hit the up arrow or the down arrow; there is not clear feedback[1]. Since then, I've found myself concerned I might have downvoted a post I really liked, so I unvote, zoom in, and revote. Even then sometimes I've remained unclear/nervous and had to zoom yet again. I'm not sure others are aware of this UI issue or make the effort in this regard.

This is a non-issue on my laptop where the cursor is quite visible and precise.

[1] Writing this post encouraged me to experiment. I guess if you vote up, you get an option to "unvote" but if you accidentally downvote, the option is to "undown". So there is more visible feedback about your vote than I was aware of. I will probably look for that going forward to ensure my voting intention was properly registered. But it's not super-obvious.