It doesn’t matter.
There’s always a confusion of matching a quote to its originator. Many end up crediting it to anonymity instead. But it rarely matters.
Many times, who said it first isn’t as important as who got it to the masses.
The dialogues in Bollywood are not written by the actors but they get credited for it.
Many celebrity books are written by ‘ghost writers’ That research, write the drafts and the do the heavy lifting. However, are not permitted to mention their names in the work and are ok with it. But the readers credit the book to the celebrity.
It doesn’t matter who started the clean India project. But Narendra Modi is credited for driving the point home.
The person attributed to the quote may give contextual understanding but it rarely adds significant value. Sample this, “There are better starters than me but I’m a strong finisher.”
Right off the bat this sounds and seems like a motivational quote. Sure, it gets amplified when you learn that it’s said by Usain Bolt. However, the irony is that the reason behind him being a weak starter is that he is just too tall for a 100m dash! But because he has longer legs he can cover move distance per stride and hence a strong finisher!
Now, does it take the punch away from the quote?
You are better off adding your own meaning to the quotes you come across.