[yukIttEft]

layperson here: won't, say a banking app complain about the now new cert it deals with instead of the bank-cert?

[alwayslikethis]

Banking apps generally hardcode their certs in to prevent this, so this wouldn't work unless you find a way to replace that cert too.

[cute_boi]

most banks already do certificate pinning, even tho it is not necessary.

[sgammon]

clearly it is necessary in some circumstances