I don't see how making a living out of professionally defending independent content producers automatically translates to sending scam e-mails. Both can be done at scale but they are not the same.
Are there actually lawyers who make a living out of the former though? To not have it be so many letters that haste is inevitable, they would have to be individually large claims. Minor violations by large entities aren't worth much, major violations by small entities aren't either (because they can't pay), and major violations by large entities are uncommon because large entities can afford counsel. Meanwhile when they happen they're coveted by every law firm that likes money, so how would anyone secure for themselves enough of those cases to specialize in it?
