100%. To an extent that's why I don't often freelance anymore as it's very easy to fall into a place where e.g. to build a booking app for a pet shop you need to become an expert in the field of veterinary.
Heh, it's funny, my partner is a vet tech and I keep thinking how interesting it would be to build a CRM for them and their patients (there is already an industry for that and some of the apps are actually decent).