When I graduated, there were companies offering me 30-40k a year in cities like Seattle. I have friends that could tell you the same story, some who took the opportunity because of the entry level market being saturated.
Bootcamp graduates are often placed in incredibly exploitative contracting environments (often in companies that also underpay, abuse and threaten H1Bs) which are farmed out to larger companies looking to get work done cheap. Though this has just been my personal experience and that of my friends. They leverage desperation.
There are a variety of high demand and well paying jobs, but not everyone is interested in them, or even cut out for them.
Because the number of openings for entry tech workers is essentially infinite. (Wait, what?)
Because non-technical work is regarded as completely worthless and there is more merit in being a minimally-competent HTML-slinger.