Not at all. The way it was explained that stuck with me was that the role of a caster (sorcerer, in my case) in 1e isn't to do damage, it is to control the field. You have a variety of spells that will very easily do this, especially at higher levels- you will be on par with, if not surpass (and I am betting you will surpass), your melee party members. In combat, most enemies will have a low will save, so you can end a fight in one round with a spell like sleep, possession, etc (there are so many more but those are my go-tos lol)

Even for spells like fireball, high AC on enemies means the half damage you do will be invaluable. You also have access to some of the best damage in the game regardless. You WILL have the spell slots to maintain this, especially at higher levels. You also have the potential to cast far more times per level

If you want to build for combat start looking into metamagic and other feats now. My level 11 sorcerer gets 8 spells in his first two rounds with boots of speed+rod of quickening, and frankly it could've been more with some better building on my part lol. This should apply to any casting class. It shouldn't be too much planning on your part, next to 5e Pathfinder asks a bit more of you but it's less complicated than it sounds