I have noticed quite a few shows I watch on TV warn after coming back from each commercial break about scenes being disturbing, etc.

I don't know how I feel about the warning. In many instances one generally has an idea before reading or watching something by its description that it might contain difficult material for them. Because "triggers" are wholly individual, what triggers you might not me and vice versa, I think it is up to the reader/watcher to acquaint themselves with what the material is about, how it is presented and decide what they want to do about it for themselves. I get triggered by normal, drama shows but I still watch them, turning away or changing the channel or getting up and leaving, etc. when I get too uncomfortable.

It is not the show's fault in that case, they are often just showing an argument or embarrassment or something I would like to better deal with in my own life but don't practice working with enough to do so. I still remember how proud I was in Good Will Hunting when I "stayed" for the entire scene near the end when he told Minnie Driver he did not love her after she had been brave and shared how scared she was and that she loved him. I want to be like that when I grow up.