Earlier quoted context omitted.
I block people on Twitter all the time, but I can't even remember the last time I had to block anyone on reddit (it was years ago). This speaks to the different models between the two -- on reddit I'm only interacting on specific subreddits, which because I've chosen them, have much nicer and more reasonable people than "all of Twitter". Twitter is always just nonstop fighting and yelling.
Reddit has a lot more people who block because they want to get in the last word and prevent you from replying.
Someone needs to analyze this as game theory and write a paper on it. It is so poorly thought out and implemented that it would be funny if reddit didn't have a monopoly on long form written discussions on a lot of topics.