I feel like an easier solution to having six different email addresses is to use Gmail aliases - I've caught a few less-than-honest companies either selling my email address, or been breached without disclosing such, simply by using an alias along the lines of '+service_name'. If any alias starts to receive spam you can setup rules to automatically delete everything that comes in with that. You also get the added benefit of significantly easier and more accurate search.
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.)