Comment by B1FIDO

I don't think y'all understand why I have separate Google accounts.

I use them for different purposes. They are "role accounts" for projects I am doing, such as geneaology and astronomy.

In order to use YouTube sanely, and store different stuff in Drive, I separate them into unique accounts. I use those accounts for specific things, and my YouTube subscriptions, playlists, etc. are tailored for each role, for example.

This is not about email at all. Obviously, I can access all those email accounts through the one app on my smartphone or the one PWA on my Chromebook. They are easily manageable but separate.

I also run 3 Outlook/Microsoft accounts, and for the same reason. (One of them is my academic account from community college, and the other two are personal.)

I don't need to give out email addresses for the "role accounts" except where I "Sign In With Google" to various services. So I don't really send/receive email from them at all, except where I'm sharing links or documents with myself (the best way to do this cross-account is still by using email, oftentimes.)