Anyway... what do you call a bard without any talent?
Okay, real talk, Drummers are a vital part of any band. As a guy who was in marching band, the Drums were our backbone.
I know it is a meme, but I gotta stand up for my mates, they had mad skills.
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This has been the basis for the sorcerer's power from the begining. Feel free to ignore it and continue to wonder why it does not make sense.
Sorcerer came about in 3.X right? Taking a perusal through the PHB from 3.5 I see nothing in the class description that says they "prefer to do things personally"
I do note they can summon Familiars, They also had access to Summon Monster 1 thru 9. command undead, Mordenkainen's faithful hound... so yeah, the basis for the sorcerers power was not that they prefered to do things themselves instead of "waste[ing] time with petty summons."
Now, I will grant that 4e didn't have them summoning anything permanent (plenty of abilities that involved a temporary summoning of something, like Blackfire Wyrm or Flight of Dragons), and 5e clearly has decided that isn't a thing, but to declare that it has been a thing since the beginning... seems to be false.
For the spirits. Well... subclasses are there for a reason? To give you more than what the base class assume or a new twist to it. If everyone get to do the new trick of the subclass... why the subclass in the first place?
Since I'm talking about a subclasses, and the other two subclasses in Tashas get summoning spells.... what is your point?
I think the bigger issue is that there are a few sorcerer subclasses where it makes sense, instead of just one at a time.