Helldritch
Hero
I don't think you are considering what I am writing.
Feeblemind is not a temporary thing, it is a full destruction of self. The target loses the possibility of communication, they lose their personality, wants, desires. It is all erased under the spell. And with a maximum save result of 15 (rolling a 20-5) If the wizard who cast this spell is of average casting ability, (+3 to stat) it is impossible to recover from without outside intervention.
And, as an 8th level spell, we could point to many many other options that would achieve a goal, without this destruction. Sequester can put a creature into suspended animation to remove them as a threat, it is 7th level.
So, since it matters how you use it, under what Good act could you justify destroying a mind and personality while leaving the body intact to be a less than a beast?
And that doesn't get into Geas, a spell that is quite abusable, since it is essentially magical slavery. For a month the target is magically charmed and must follow your commands or take 5d10 psychic damage (with an average of 27 damage, this means that most targets below level 3 or CR 2 this is obey me or die). Are we going to be of the position that it is morally good to enslave someone under pain of death as long as they are evil?
I really think you are not reading what I write. A tool, magic is a tool. Most spells can be used for good or evil. Only two are purely for evil purpose and both create undead. All the other spells you mentioned have the potential to be used for evil or for good. That is the choice of the caster and for the judgement of the DM while the other two are not opened for debate.
You only mention the cases in which the spells can be used for evil causes to try to prove that your point is valid. But it is not. You purposely ignore the cases where the spells will be used for the greater good so that you are "right" to win an unsustainable position.
So let me give you a few examples
Feeblemind: The evil wizard killed countless people. But no death penalties and the risks of him to escape are great. An enlightened society will condemn him to never cast a spell again. Thus the feeblemind. The vilain will continue forced labour for the rest of his sentence (however long it can be, even life) without fear of him escaping and killing again. A life is preserved with the added bonus that it won't "mind" its incarceration.
Feeblemind can also be used to capture a caster since without spells, a caster is usually not a treath. You can then restore him later for further questioning.
Geas: The evil Gark says he wants to redeem himself. He offers to guide the characters to the lair of his evil former master the Lich Machintrukchouette. But Gark is known to not be true to his words. A geas spell will ensure that he will be faithful to his words. If he truly means to redeem himself, he has nothing to fear.
And voilà! Two Lawfull Good use of your "Evil" spells.
But we have stats for other younglings. Orcs were just one of the examples that everyone was familiar with from my list of 75 sentient evil species.
So, dragons and Neogi are born evil, we have stats for them as hatchlings. So I can ask the same question I asked with orcs with them.
When a Neogi gives birth (lays eggs technically) they are bringing an evil creature into the world. If bringing an evil creature into the world is an evil act, then by this logic, Neogi laying eggs, is an evil act. The same for Chromatic Dragons.
I mean, it must be because of your own assertion "Creating evil things is always evil. No matter your intention." So giving birth is an evil act for these creatures that we have baby stats for.
Again, as I said, and which you keep ignoring, is that we do not have the said stats. If you want to assume something from other stat blocs it is your prerogative as a DM. It can't be debated as you can house rule/homebrew anything since we do not have stat blocs. For the others races to which we do have stat blocs, you state the obvious yourself, giving a strong point for my position and not yours.