Those aren't really effective criteria to use as a flat difference, though. Almost everything you named is stuff that that label now takes care of for the artist as part of a 360 deal. And since it's part of that deal, the label is not only taking a bite out of any revenue generated from those opportunities, but they're also holding any and all work to make those possible against the artist as expenses. That's how we've ended up with so many stories where an artist talks about how their songs were everywhere, but they were eating grilled cheese sandwiches every night.
Even beyond that, a lot of hit songs arent songs as.much as they are assembled products. So, before an artist even has an opportunity to lay vocals, the label has paid a bunch of other people to basically get them stems, a hook, and probably a reference track.
It's obviously not a universal thing, but a lot of independent artists stay independent just because they can make those deals on their own with whoever they can get access to/afford, and simplify the math on how everybody gets paid.