I can see how you are in a totally different boat, so can see why you have to manage things much more closely.
I've never lived somewhere with storage heaters - I guess I am lucky in having only lived in 3 different houses with my parents, and then as an adult only two properties.
My parents first house didn't have central heating as such, it was a new build in the 60s with a flat roof, a terrace, and the heating was I believe a single vent in the floor - one per floor, that blew out warm air, but it was terrible iirc, or perhaps it was just too expensive, as I do recall ice on the inside of the windows in the depths of winter.
I was more referring to those with a standard boiler, and radiators throughout their property.
Both my wife and myself are quite hardy, can quite happily sit in dressing gowns in the morning while the stat reads 17c, at 16 it's a bit too cold.
And yet, other times, later in yhe day and dressed, we will feel cold at perhaps 18c.
It makes no sense so it must be more about how you feel, humidity, etc etc.
This is the UK of course with its 'four seasons in one day' so that probably doesn't help.
Should we set the stat to 19 and leave it there ?...probably feel better in the day (not that we generally feel the need to) but then we like windows open at night, just too hot, even last night, window ajar, heating off i woke up sweating.
If only it were as simple as one setting fits all...it simply doesn't for some people