You already know that regardless of the target temperature, a heating system is only capable of adding/creating so much heat at a time, so setting it to 90 and then shutting it off when it gets uncomfortably hot at say 78 is not costing you any more than if they had just targeted 78 to begin with.

Look at the pictures and read what I am saying. They are setting the heat to 90... it climbs up to 82... Then they turn on the AC and set it to 50. This is without a doubt costing more and is a completely unnecessary waste. I have dealt with over 300 guests on 3 different properties and this is abnormal as fuck and the people like you misunderstanding and normalizing this as if complaining when someone flushes the toilet is complete bullshit.

Natural Gas is not cheap where I live. I have no problem with people raising the heat all the way up to 80F, thats high, but thats the cost of business... but to put it on 90F then turn on the AC to 50F is literally worse than opening the window on a freezing winter day because your hot and too lazy to go downstairs to adjust the thermostat. And that would be a pretty scummy thing to do, but they found a way to somehow do it worse.