Yeah regardless of what I’m doing with Ethel I’ll have 12-18 hill giant strength potions before she leaves the grove. After all there’s the easiest vendor to steal from you’ve ever seen near the entrance, and leveling up resets vendor inventories which means recruiting and respeccing does as well, potentially multiple times. That’ll normally last me until the myconid colony.
Just saying, there’s a difference between game imposed challenges and self imposed challenges. ‘I think long rests are op so I don’t use a lot of them, that makes classes which don’t rely on them strong’; ‘I think strength options are OP and that makes classes which don’t rely on them strong’; these are real things I’ve seen said but you may as well say I think weapons are OP so I don’t use them and that makes Monk the best martial character in the game. Given that constraint entirely of my making, sure. Could also say you think spells are OP and not use them, you can add any challenge layers to the game you like. But strength potions are indeed widely available in the base game and are very synergistic with Tavern Brawler and Barb thrower builds.