I know exactly what your sayingI think it's mostly people think their way or the highway. IMO everyone keeps their BPs a little differently and some people think a 2 degree fluctuation is going to kill your snake. In all honesty I think they can live in a range of temps that may have a few degree difference from day to night, I'm *almost* positive it's not a perfect unchanging temp in the wild
I keep mine in a rack and some people would say it's too hot and some would say it's too cold. It's all personal opinion and BPs do flourish without two hides, or two really different heat gradients.