Because The RCC wants money and because it aligns itself with power.  Now, not EVERY RCC priest, brother, deacon, cardinal, archbishop, etc., does that.  It appears Pope Francis doesn't do that (altho' I don't know that for a fact).  But, by far, I have run into more who do than those who don't.  And I'm not Catholic anymore -- I stopped believing when I was about 20, and I 'officially left' when I was 40 -- my kids were grown, and I left my hubby who I had never really loved -- and I left The RCC!  However, it took decades for me to stop being homesick for The RCC, The Mass, etc.  But as the years went by, I became less and less homesick, and now I'm not homesick anymore at all and haven't been in years.  And I'm so grateful that I don't have to spend my remaining years worrying about going to Hell -- which is what my father and mother did and what my peers do -- that I can't see straight.  :-)