Uh, SPF was being developed long before Gmail was a thing and was pushed for by at least 1 other (Yahoo) mass mail provider, as was reverse DNS verification. If you're going to be salty at someone, it should be the spammers.
I think the point still stands. As annoying as any of these technologies can be for someone maintaining a mail server, the unfortunate reality is that we don't live in the early web utopia anymore. There are people seriously trying to bypass and break these systems, which is why these protocols are needed. Being angry at them doesn't solve the underlying issue.
