Don't look to people who don't know what they're talking about to "clear things up" for you. If you think they have any qualms about leaving you to deal with the blowback after misleading you with uninformed takes (and pointing the finger at you for putting your faith in them to begin with), then you're setting yourself up to be burned.

There's a reason why everyone who has their ducks in a row (in other words, people with competent legal counsel along with something to lose, e.g. Mozilla, Google, Apple, Microsoft, etc) will bake something like about:license into the stuff they work on, even if it's buried in some "open source licenses" entry of an About screen reachable by the last menu item in the system settings. Spoiler alert: it's because they have to—in order to comply with the terms of the license. It's not because they just think it's the nice thing to do. (And definitely not because it's fun and easy to do, because it's not.)