I think the debates earlier about the $70-100K being enough is entirely subjective. If you live in a major city or metro area, that may be just enough to earn a living if you're single. But the cost of living varies greatly just in the continental US, not to mention other places that would have streamers.
And the 60 hours a week is also subjective. For a salary job in DC I work 45-50 hours a week in the office, but take into account the commute and that turns into 55-60+ hours a week for work alone. Not to mention the added expense of gas, parking, tolls, etc. (again, varies by area you live in).
I just hope that those who choose to go for it as a career are the ambitious types that eventually push for a brand or "company" of their own. By that, I mean eventually being able to maintain a Twitch, youtube, blog, etc. where you not only bring in additional income, but develop skills that could transfer to a different career (journalism jumps to mind).