No, the Democrats didn’t think it was “just fine” when they changed the rules, didn’t particularly want to change them, and only changed them as a last resort. Republicans forced their hand when they obstructed every single Obama judicial appointment for years, even when most of those appointments were moderates. For no reason other than they were appointed by Obama. Federal courts were dwindling due to attrition, leaving some benches less than half occupied. Cases were piling up and not being able to be heard because of a lack of judges. Something had to be done.
That’s not the case here.