Before I got LASIK, I wore contacts but travelled with glasses. There are a huger variety of reasons that you might use contacts even if you have your glasses available. In fact, everyone I know with contacts also always has a pair of glasses that goes with them on travels.

In my case I worked onboard tall ships. Contacts let me be on deck in inclement weather without worrying about spray, fog, or losing a pair of glasses, let me use any pair of sunglasses instead of a ~$250+ pair of prescription glasses, as well as things like diving and snorkelling without needing a $150 prescription mask.

You can get cheap glasses from China. I found on reddit people swearing by zenottic on aliexpress and got some glasses for 20-30$. Nothing to scream about, plastic but they do the job really well. I already lost one pair in the sea, which would have been bad if I had 200$+ glasses.

I wear contacts in water or if I lose my glasses, but try to use glasses most of the time to let my eyes breathe.