Without getting in the history of the parent poster, he's not wrong. H1B is a temporary (non-immigrant) visa which allows dual intent. Yes, most people on dual intent visas eventually petition for a green card but I think it's unfair to qualify his post as "junk knowledge". Same thing with L-1A and O-1.
Source : https://www.uscis.gov/working-united-states/temporary-nonimm...