It is common to do DSD in < 10 meters near shore in South East Asia for tourists.
I was an AOW diver with < 30 dives when I visited Bali 2 years ago on a sightseeing trip, I decided to fit in 2 dives. So I called up a LDS to check on which dive sites are nearer to where I stay and worth diving. I was told the nearest would be Nusa Dua(10 mins by car, dive site is near shore), which is not a very popular dive site and not much too see compare to other sites which are further (> 1 hours by car at least), or Nusa Penida. Nusa Penida is >1hour by boat with good chances to see Mantas and Mola Mola. It was tempting but later I was asked if I was an 'experienced' diver cos Nusa Penida are know for its treacherous currents and the DM told me its can be like in a washing machine. With under 30 dives under my belt back then, I was not confident to dive there having previously dove in strong currents sites before,so I chose to a easier to dive location.
I would not recommend Nusa Penida for a less experienced diver. If its true the deceased was doing DSD, why on earth the DM taking them there knowing Nusa Penida are known with strong currents.