The big thing about the space shuttles is that all those missions were manned.
When you have a mission with multiple humans on board, the stakes are much higher.
When you have a mission with multiple humans on board, the stakes are much higher.
There were 135 shuttle flights, with 2 crews lost (1 on the way up).
I would much prefer the odds of flying on Falcon 9, especially since it actually has a viable launch escape system.