It has nothing to do with Kakashi not having abilities outside of the sharingan. I can create a hundred different ways for him to fight without it. It's just that there's no feats of him fighting without it, and anything you or I or anyone else claims he does in a fight without it has nothing to back it up, and holds little water in a debate unless the person or people you're debating with give you the freedom to do that, which most vs threads won't.
The most manga scans show Kakashi fighting with his 3T i know, but that doesn't mean he can't use his jutsus anymore without the sharingan. Okay some debaters are very strict, than its not possible backing Kakashi up with manga scans, but most of the people know that Hokage Kakashi can use all of his jutsus still as fine as without the sharingan, except the proper use of raikiri.
There are still manga scans where Kakashi shows what he have got, without the sharingan or the sharingan covered.
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(to show that he has excellent senses like listening to air vibrations , or smelling)
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( proves that he can aim sth small like a hand while falling perfectly with a kunai, while saving sakura and himself)
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(to prove that his reflexes are still good in base)
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(taijutsu in base is fine)
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(speed in base is still fine, kept up with obito and managed to get in front of an ash bone, while the gravity was stronger)
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( he is able to use the rasengan in base without the sharingan, is a good alternative to raikiri)
I know there are not many manga scans of him where he uses techniques or moves without the sharingan, but its safe to say that he can use all other raikiri variants or his other shown ninjutsus without the sharingan, i doubt the debaters will be this strict.