It’s popular in some circles to claim that a single person can’t possibly be expected to both (for example) design software and build software. It must only be possible to do one or the other.
Almost nobody (that I know of) upon hearing that someone is relatively good at cooking, however, exclaims “how is that even remotely possible when you’re also a competent driver?”
Humans are good at so many things; you can be good at so many things. Maybe not everything all at once, but most things eventually. If you assume that you can, you probably can (and vice versa).