(This quip means that if a demagogue aggrandizes themself as a hero or savior, you should be suspicious of whether they really are as saintly as they claim to be.)
Edit:
I'm not saying this quip about paywallskip, which I think is a kindhearted service because it helps reduce the information gap, or digital divide, between the middle class and those stuck in poverty.
Rather, the joke/warning is about demagogues in politics or in wealthy churches, stuff like that.
Not about this post.
Paywallskip never called themselves a hero - an appreciative user did, which is authentic and sweet.
I think no one should ever call themselves a hero.
Just help people, like Paywallskip is doing.
I guess that what real heroes always say, both in movies and in real life, is "I was just doing my job". See e.g. this school bus driver who saved a child's life:
https://www.youtube.com/shorts/xnW3NHbMTRs
(short, inspiring video)