What considerations should privacy-minded people take into account to make this decision?

For context, I’m using FairEmail because K-9 doesn’t seem to be able to move to a desired folder multiple emails at a time. K-9 doesn’t use OAuth, so I don’t have a choice to make there.

However, FairEmail does use OAuth. And, when reading about OAuth, it apparently is safer than the alternative. This alternative is either using the main account (with no 2FA) or using an app-specific password (with 2FA activated).

Hearing this, it would be a no-brainer for me to choose the OAuth, but the issue is that Google only lets you do OAuth if the app is downloaded from the Google Play Store and if the account is set up as a phone-wide account. Ouch.

And yet I wonder if the security of OAuth is so much greater that I should forget about the alternative.