> If you're trying to hide who you are from our very first interaction, that's a massive red flag.

You conflate email with identity, just like the media companies conflated IP addresses.

It's not hiding who you are, it's hiding my real email address behind a mask that you can't choose to sell off to marketers, or spam yourself, or otherwise profit off, regardless of the nature of our relationship - I've got plenty of spam emails from companies that I closed accounts with, thus severing our relationship.

> If you can trivially create hundreds of these emails, and fill in the rest of the required info with bought/stolen/generated PII, now I have a vector for mass fraud. Requiring you to use a recognized non-anonymized provider doesn't stop you, but it sure does slow you down. (It's not this simple of course, but all security works in layers)

It's not that simple, but I guarantee it doesn't remotely slow anyone down, not at the scales we're talking. Maybe if you're talking one entity and tens or hundreds of thousands of accounts, but it's laughably naive to believe that such a person who is set up to conduct "mass fraud" can't create 100 Gmail/Outlook/iCloud email addresses a day, if not an hour, with near zero effort (it's not like they're committing "mass fraud" by hand, after all).