The whole reason to use a thermostat correctly (including proper placement of the probe) is so that you DON'T have to reach into the tank and check temps 20 times per day. A properly used reliable thermostat won't allow for temperatures that are too cold or too warm - that's the whole point and why we're trying to help (because your other choices involve possible harm to your snake).
Soap box time! I seriously wish that thermostats didn't have numeric temperature reading displays on them at all. People get too worked up about the "temperature" of their thermostat and how or why it's not the same as the temperature of their hot spot and why they still need to check the temperature of that hot spot if "that's why I spent so much money on this thermostat!". Someone should design a mid-range proportional thermostat with color settings instead of numbers (like a rheostat's dial). In my head, that would make things so much easier to explain when these discussions happen.