I don’t get why people rush to the next replica platform that will go down the exact same path of overstimulating you / mentally harming you.

I think they get used to the level of stimulation and now feel “wrong” without it. It takes a certain self-awareness to realize that it would be healthier to recalibrate your expectations. (I don’t think Pixelfed is a comparatively harmful platform at the moment anyway, although I suppose it could someday become one.)