That's 100% correct though I'd like to add the caveat that you shouldn't swim in clothing -- Burkinis are made for swimming, of course, and they're fine, but the article says nothing about what the woman actually wore, if you're about to go swimming in loose-fitting ordinary cloth yes you should absolutely be stopped.

We got basic rescue swimmer qualifications in school (DLRG Bronze) and part of that was swimming in clothing (in particular, age-old ill-fitting flecktarn they picked up somewhere) and then undressing while in water, it is not easy even if you're a stellar swimmer, if you can barely hold yourself over water without panicking (that's like the default skill level of people who can supposedly swim) you're done for. Doubly so on the fucking beach with waves and undertow and everything.