Just looking at some of the gear in my inventory that I've gotten today in runs, it illustrates exactly why the class lock is unnecessary 95% of the time.

I have two pairs of the same kind of pants, one for DRG and one for BLM. The DRG ones are blue, the BLM ones are red, they are otherwise identical. My DRG outfit is red, there's really no reason why I shouldn't be able to wear the red ones as glamour.

I also have a pair of healer-only sandals in my inventory that AFAIK have no lookalikes for other classes. Why? Everyone should be able to wear sandals...

Same with a pair of ARC/BRD/MCH-only gloves I'm looking at. They're just normal leather gloves. Why shouldn't other classes be allowed to use them?

These are just a few examples that I didn't even look for, but there are soooooo many similar situations with other gear and it's just silly.