I delete probably half of all posts/responses I start (across many accounts). Sometimes it’s because I realise the answer to my question while typing it but more often than not it’s because I realise what I’m saying is ambiguous/opinionated and I get too anxious about someone taking it the totally wrong way and getting offended or annoyed.
Annoyingly this gets in the way of a lot of my online communication. Either that or I realise no one cares what my opinion is… Unless they directly ask- thanks OP!