Yes. You can also give yourself a haircut or represent yourself in court.
Look, it would take several hours to go to each of these 30 sites and complete the process. Some of these opt-outs are online only, some require a confirmation email, some requiring drafting an email with specific language, some require creating an account, and some require a real cell phone number.
After all that, not all remove you the first time you ask. Some require follow up and we do that for you.
Then there is the monitoring. Yes, you could go to these sites every day to make certain you didn't show up again, but you have better things to do.