> I have a workflow where I use 1Password on my phone - locally, no sync, do not want sync, can not use sync. Obviously this is not my main way of using 1Password. On that phone, I often remove 1Password and reinstall it.

My guess is that he's doing this when he crosses borders or in other situations where he might be subject to an intrusive search. So he carries a minimal set of passwords that he needs for that trip in a local vault. Maybe just his airline login, a throwaway email account, and an innocuous credit card account. If he's forced to login to his 1Password account during a search or inspection, he won't reveal his lifetime accumulation of accounts and passwords.