You can also jump the right if statement during runtime, but yeah, you are still modifying the program's execution rather than something on the outside. That's the whole point of TLS: both parties know their connection is secure. So I'd say "no, there is no other way, other than by finding a vulnerability in TLS".
If the app uses the system TLS libraries for comparing certificates, you could just make the appropriate API always return "true". In-memory patching avoids affecting anything else.
Last time I did this, I had to reverse the binaries and remove the cert pinning code. There are a few examples of this around the place, but it can get fairly complex pretty quickly.
