So your ideological argument only applies as the game gets harder and not easier? That makes no sense.
If you think the problem is perpetuating "lazy" solutions then you should want the easy difficulties to have simpler enemy formations, weaker skill loadouts, and enemy types all up and down the line. Stop perpetuating low effort bandaids.
And if you don't care about easy, why do you care about a HP buffed version of classic? Tactican still exists. No one is calling for the removal of a difficulty level that has all the enhancements you want. Divinity would still be perpetuating the things you want.
Nor have you answered the question as to when modifying health is okay. Why is it okay to modify health in tactician? Who determines the just right amount of health for any mode for that matter? Why is the current amount of health in classic desirable over a different amount?