So, I noticed that upon making a free Proton Mail account, you have the option of fully integrating the account with varioius features to double the account's storage. One of those features is Auto-Forwarding with Gmail, and it is not optional for some reason—i.e., it is required that you have a Gmail account in order to be considered using all of Proton's features. I'm not sure why this is the default, that you make a Gmail account just to connect it to your Proton Mail account and only use the Proton Mail account. I have no desire to use Gmail instead of Proton, so why must I have Gmail at all in order to just use Proton anyways?