A bit of reality here: Mental health stigma is not something that the "professionally offended" have invented. It is real, and one of the effects is that people who really, really should get professional help don't seek it because of the stigma. Sometimes this leads to them killing themselves. Sometimes this leads to them killing others. Sometimes it 'just' leads to them having a much crapper life than they might otherwise have done if they's had better support at the right time.
And that effects us all, if only because it's a heck of a lot more expensive for the taxpayer when someone doesn't get a timely, outpatient intervention and that leads ultimately to them being sectioned for months or even years. Secure mental health units are very expensive.
Challenging anything that stigmatises mental health problems is, imo, absolutely the right thing to do.