I also use a service like this on all my bank accounts (4 different bank accounts in the US), companies etc. I do not hide the fact that it is a post box with the bank, I just tell them this fact, so I don't see any issue with this. All the mail is scanned and then forwarded to another location or trashed, whatever I prefer.

I think receiving physical mail is insane.

I do all of this for my US businesses, and it's essential to do it this way as I don't live in the US so I would never be there to collect the mail in any case!

In any case there are lots of alternatives to outbox!