You just described a way to decrease the security of Bitcoin. Users already decided collectively that no amount of security should be exchanged for other features inside Bitcoin. Even taproot, which is a relatively small change takes years to get to a point that it's accepted.

It's like Kosher food: if a small percentage of people want food to be kosher, it's often easer to make all food Kosher.

As Michael Saylor says, Bitcoin is good enough to store hundreds of trillions of dollars. Just don't f*ck it up.