Surely there's some compromise middle ground? Let me download "safe-curl-bash" (scb) that only runs a script if it's trusted in some manner? Maybe the checksum matches from a crowdsourced database.
"Sorry only 9 people have declared this script valid and your threshold is 100. Here's a cat of the script and we will ask you if it looks valid or not or don't know."
I also think it's a bit more realistic than the, "anyone who does this should be reading the script first to check that it's safe." Yes, and I check the passenger jet for flaws before I board, too!
Just spitballing.
There is an entire infrastructure of people and processes in place to make sure that you don't have to check your passenger jet for flaws to be reasonably sure it's safe. No such infrastructure exists to protect you from the consequences of curl-bashing software off some random Web site.