IMHO the entire voting thing is useless. If you don’t like a post, don’t read it. If the post is aggressive and very harmful (racist, fascist), inform the admin to remove it. If the post is interesting, read it and mark as done. So, why voting? In Reddit and even here on Lemmy, I saw critical comments - which I myself sometimes do not like, but did not downvote - that were heavily downvoted by others (though it was just a critical view). What does this mean? That a user has to play according to the rules of the masses? That he/she cannot express his/her different views? If you don’t like or think a comment is weirded, ask why. Engage the person in a discussion (which may be promoted by the lack of a voting system). Perhaps you can convince him/her, or perhaps the other user can show you a different perspective, which may turn out to be a bit extreme, but not that wrong either. Right?
Defaults are generally who do not want to understand in depth what they are doing (no offence). Example from other sphere: in R-Cran (used to write statistical models), some functions have defaults to either choose a particular algorithm or an optimisation value. I have heard almost about nobody among students, PhDs and even higher up the ladder, who took the time to understand what is happening below the shell. Instead these people took just the defaults, it worked (result was significant), done. However, if they may have chosen another algorithm, things may have turned differently, which would open up a box with many questions concerning modelling adequacy and understanding of data. It is the same with defaults in Linux.