Not at all. They want people to experience what they have, but they don't want a small subset of people selling prints, T-shirts, and little statues. From their perspective, they sell excellent quality prints, etc. in the gift shop and online, and the proceeds benefit the collection. So they lock down downloads if they can.
Almost impossible to stop a determined actor from downloading media that you're serving to a browser. Most organizations don't have the budget or understanding. They outsource their websites, and ask for it to be as secure as possible.
