I have my email as an alias; i use the format firstName.lastName.randomLetters@aleeas.me It works well for me and it goes to my proton.
I think you should, because it allows you to have a hidden private email, for your confidential services. It will go to your primary inbox, but unable to be attacked without knowing the ‘secret’ email. In this case it is useful inxthat it is a different email that isn’t public; maxing it harderxto hack you, but with the ease of it still going to your normal(if you use proton) inbox.