Pretty much.
You are wrong. There is learning in ever facet of aviation. Whether it's improving routines, safety, or emergency response. It is our nature as pilots to learn from accidents and get better.
We still have dudes land gear up, or at the wrong airport, or taking birds on takeoff and crashing, etc. etc. You can cry all day about "enough is enough" but it's not unique to airshows. People die. As long as humans pilot aircraft, this will be the case.
Let me know how hanging out at the local airport goes for kids these days. A lot of kids only get to see fighters and high performance aircraft up close and personal at airshows.
Who cares?