This is stupid to say delete the wallet then try an access the funds.
ofc you're not going to be able to get to them if the app is gone.
Discussion
The point he’s making is that you never had the private key.
If you’re using a self-custody wallet and your seed phrase is backed up, the funds are always yours and waiting for you whenever you want them.
You don’t have to email someone in another country and ask for them back.
Except that with self-custodial Bitcoin wallets, that’s exactly what you can do 🤙
Assuming you wrote down your seed phrase, of course
Well not everyone has this option so-