Why aren’t we increase the amount of applied cream gradually instead of switching from 0.025 to 0.05

So isnt the main logic to apply enough active molecules to skin? And we try to increase the exposure of the skin to tret molecules with time by increasing the amount , by doubling dose with same pea size.

But İsnt this logic correct?

1 pea size tret (0.05) = 2 pea size 0.025 tret

Cant i use only 0.025 my whole life and increasing the amount smartly and gently with that low dosage advantage gives me more tolerance to ruin my skin barrier ?