Unfortunately, the whole Minecraft thing caused a lot of people to buy them with little understanding of proper care, so I suspect there's some "that's cool but please don't rush in unprepared" in the hard to keep message. There are also some misconceptions around water quality requirements, they really don't like chemical pollutants, but I have no issues with local municipal water, other areas could have issues and require RO water, etc. but there are plenty of tropical fish keepers in this same situation.

And then there's the water temp thing, that caught me off-guard and I was using frozen water bottles for a few weeks until my chiller arrived, if the tank had been located in a different part of the house it might have been required.