The truth is that I didn't really like the Mr. Rogers show when I was a kid, so I was a bit hesitant to see the film.
Go see it, it is wonderful. It is a bit of an antidote to the general anxiety and depression of this particular polarized period. I had no idea that I would relate so much to him, not only as a bit of a (functional!) obsessive-compulsive, but also in his persistently positive unconditional positive regard (a phrase reminiscent of another famous loving, accepting Rogers--Carl); and also in his fierce protection and advocacy for children.
Then you'll learn what the title of this post means also.