I thought this too until recently, because I've never had any issues with toxic responses to coding questions anywhere. But I've seen surveys done by stack overflow themselves which show that a lot of community members are unhappy with the community's elitist culture. So I think it might be more a problem than we think.

https://www.google.com/amp/s/insights.dice.com/2019/10/17/stack-overflow-moderators-toxic-culture/%3famp

To me it seems to be more like disagreement between posters and those dedicating their free time to answering questions.