My personal experience says if your husbandry is on, and a snake wants to soak, there gonna soak. Not all do, but some will. Now if there’s a negative reason they’re soaking that’s a whole other ball game. I seen plenty of boas and balls take a soak, in tanks and in dedicated enclosers. Not all will, but some will seasonally. And some seem to like it more. Also, it’s hard to see a snake soak when a large enough container is not provided. In other words, tiny water dishes are kinda hard to soak in. Just my opinion.