Because...  

It is a perspective issue.  I knew a long time ago when I started flight school (after graduating college) that I potentially made a career mistake.  Given the level of "turds" immediately exposed to in the industry.  HAA, being the worst of the worst was a major turning point, especially at a hospital-based program where the turnover was astronomically high.  One of the major reasons positions are available is because pilots are either quitting or being fired for standing up for themselves in a tyrannical and toxic environment.  Ironically the program operated like a well-oiled machine when the so called "managers" were on vacation.  When they came back anarchy and chaos ensued.  That level of malevolence and ignorance is unsustainable in any environment, more so in a "professional" safety sensitive career.  

Luckily for myself I formulated a plan, willingly burned that bridge down to the ground and welded the doors shut.  I now own several rental houses (paid in full) and NEVER again will I have to work weekends, nights, OT, put up with Kool aid drinking, back stabbing, ignorant morons again!

Don't get me wrong, community-based programs were fun in the beginning.  Still had their share of problems but rare and manageable.  I knew with 100% certainty the day of the interview with the hospital that it was going to be the end of my patience with helicopter HAA BS!

So, having said that, If you are one of those people who still enjoy flying despite the constant sacrifices, you don’t mind working nights, weekends, holidays, out in the heat/cold, dealing with immature nonsense blah blah then by all means...   Knock yourself out.