I don't follow your science (if it is science). On a CTek charger the battery does not get hot or overheat. It trickle charges to peak voltage, then cuts out charging. When the potential difference falls (as it does with cranking the starter motor), the charger cuts in (like the output from an alternator) to top it up.
There is a recondition function that cleans the plates. I have not used that function because the Porsche had a new Bosch S5 in 2016 and the Gransport had a new Exide Premium battery in 2018. Allowing the battery voltage to fall too low and trying to resuscitate is what kills it and fails to recover the battery. I know loads of guys who keep their porsches on ctek charger for months and months interspersed by a few weeks of usage but still on ctek if not used daily and nobody has ever lost a battery or cooked a battery. Some (me included) had a dead battery on a ctek but that was due to a battery life being expired. The Porsche was on its original battery in 2016 (14 years old) and the Gransport on its original battery in 2018 (11 years).
It is science. I work for a company that provides equipment and battery arrays to telecoms and internet companies globally.
Your understanding of how a ctek (or other chargers) is not correct. They charge at a fixed voltage until the current drops to a certain point and then drop back to what is known as a float voltage. This is between 13.2 and 13.4 volts for a car battery, a level that maintains the charge but doesn’t add further stored energy. In essence it offsets the losses from the internal resistance.
The required float voltage varies with temperature and must be reduced when the block is warmer. This is what is known as temperature compensation. If the float voltage is fixed (as it is with a ctek and other battery maintainers) and the temperature gets too high this damages the plates.
Now, I didn’t say the charger makes the battery hot, although the process of charging and floating a battery introduces heat. But at times the sun shines, enclosed car bodies and houses warm up, and this is where things start to go wrong.
So, in short, your experience is your own, others have had different experiences and the reason for this is likely to be based on the above. In any event, valve regulated lead acid batteries benefit from regular, shallow cycling which is what running a charger / maintainer on a timer would produce.
Of course you may know better, in which case disregard the above and carry on as you are.