Hi TM I don’t have a water bowl in his vivarium as I mist it in the morning and mist Cactus on his body and head where he drinks the running water off him. I do this everyday. I was told by the guys in the shop not to put one in. One of these was the owner who had been breeding and handling reptiles and exotic animals for over 30 years. He’s a qualified zoologist and does tours and talks. The other guy had a dragon for 17 years. I have taken them at their word. Cactus has probeardie life substrate. Which is great and looks authentic to the outback lol if I knew what that looked like lol
What you say is about supplying water by hand everyday, which is fine, its a good way to ensure they drink is to drop water onto its snout and if you start them young then they pick it up quick, no different to how they would act when caught in the rain, but also be aware they would run and hide to get out of the rain... very light spray is ok, actually getting them wet everyday isnt great for them long term, and a bad idea during shedding (and cold water can, at worst, give them thermal shock, needs to be at least room temp)
However, having a water bowl in there with a fresh daily supply is still a good idea. Position it in the cool end and it will help a little with humidity and it means if the animal wants water, it has access.
If you tie this in with dropping water on its snout over it so it sees movement in the water, you can teach them they have a fresh supply whenever they wants, rather than reliance on you.
Theres nothing saying you cant do both, it will drink what it wants to and they dont need huge amounts if they have a good daily supply to hydrate them (which includes live food and decent veg being supplied).