If drag recognise there’s a transition between slang and non-slang so that one “used to” be the other, then slang both exists and the term isn’t meaningless. That’s without going into actual linguistically, where even the most descriptivist layabout would acknowledge the existence and indeed value of slang.
Drag doesn’t believe in slang. All words used to be “slang”. It’s meaningless.
If drag recognise there’s a transition between slang and non-slang so that one “used to” be the other, then slang both exists and the term isn’t meaningless. That’s without going into actual linguistically, where even the most descriptivist layabout would acknowledge the existence and indeed value of slang.