Honestly the main thing I'm getting from this thread is that some of you are long resting ridiculously often.

These potions are abundant.
You can give your martial character(s) free 21 strength every long rest and get all the way from start through act 2, if not also all the way through act 3, without ever buying a single potion.
You won't need to. There's far too many you'll just loot, and the few extras you'll make after looting the ingredients.

The only way you could manage to make using these potions seem like you're wasting too much gold, is if you long rest after literally every fight, maybe even sprinkling some cases of doing half a fight, fleeing, resting, then going back.
And doing that with a party of 4 melee's instead of using any casters or archers.

My first tactician run is definitely going to be an 8 strength barbarian because I know I'll be able to potion my way through the entire game without buying a single one.
And I won't be the first person to have done it.
Because we'll actually do multiple fights in one day like you're bloody supposed to.