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This is pretty common with iconic beaches. Waikiki in Honolulu is also not natural, and in fact uses sand from southern California.

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The main beaches for tourists in the Canary Islands (on Tenerife and Gran Canaria, at least) were built with sand imported from the Sahara. (There are black volcanic sand beaches there naturally, but those were thought to be unappealing to tourists — at least back in the 1960s, when the tourism industry was starting up.)

I don't see how this is problematic if it works. And it does seem to work. Are humans not allowed to alter nature? We have been doing that for a very very long time.

The problem with artificial beaches is that they erode away pretty quickly and need replenishing at great expense, since there’s no natural way to sustain that. Hence the article

The benefit stills seems to outweigh the cost by a lot.

This is very debatable. Hawaii for example is no longer dredging sand from Socal at the very least, and the state has prioritized its unique ecosystems as a bigger tourism draw.

You can find sandy beaches pretty easily, but in tourism often you live and die by what differentiates you, particularly if you are expensive like Hawaii.

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