Something can be both bad and not stigmatized. Divorce is a pretty good example here. It's not stigmatized, and to prove it's not say with a straight face it should be illegal and you won't be able to blink before the backlash hits you. It's not stigmatized at all. Most individuals who get married will get divorced. The way the numbers work out something like 60-70% of all marriages contain at least one divorced partner. Saying it's stigmatized is silly and doesn't line up with reality. But of course it's an objectively bad thing. It's messy, it's expensive, feelings get hurt, often times years or decades of peoples' lives are wasted.
I don't have to say it with a straight face because your sibling poster did it for me. Something can be both common and stigmatized. Yes, divorce can be messy, expensive, emotionally fraught, and take time. Mine was, and it still wasn't 'bad' or even undesirable. Starting a business, learning an instrument, training for a sport can also be all those things. We don't call them 'bad', or 'evil', because we don't assume the end result is undesirable.
The comparison can't be to an imaginary world where everyone always picks the best partner. It has to be to the real world where people don't always pick the best partner and the absence of divorce means they're stuck with them.
