

No, not everything in that list applies to every industry. The car market isn’t a monopoly, but it definitely has issues with government and regulatory capture (and perhaps others, I’m not expert in auto manufacturing). But even without those issues the nature of car making today gives it a high barrier of entry for new comers.
And as others pointed out, the fact it’s not a monopoly leads to more unpopular ideas being scrapped.
Yep. Most of the time online you won’t convince the person you’re arguing against, BUT to convince people reading the thread. For the most part, arguing online is performative, for the purpose of the audience rather than the participants.