I think it also has to do with the fact some people can be too nice for their own good. I use to say yes to most people if they wanted to do a 1x1 unless it was smut related. It's why I've gotten very picky with who I do 1x1's with now, because I've been through some shit with that and had to politely drop them. Sometimes it's not them being jerks or weird, just not the style of RP the other person wants.