Well Kurama himself is a living being that Naruto borrows power from hence why Naruto told Obito that he wasn't fighting him alone since Kurama was there helping him.
The Sharingan is not alive so I wouldn't consider it a borrowed power or the same concept as Kurama at all. EMS on the other hand is more like a stolen power since it stems from another being's eyes. In Madara's case their Izuna's eyes and as for Sasuke, Itachi's eyes. (Nagato counts too since his eyes originaly belonged to Izuna.
This is the reason why Son hated humans. Because humans viewed tailed beasts as nothing more than mere tools. With Naruto and Bee apparently being the exception which is why they entrusted their freedom to Naruto.
Regardless of whether it's stolen or borrowed power. Power is power so try to ignore people who try to downplay Naruto for these reasons. Point being, Kurama chose to help Naruto and they should deal with it.
I guess the same could apply to Sasuke. His MS is inherited and EMS is "stolen". But in the end, he has access to it regardless and people should just deal with it.