ur not wrong but when kakashi was telling naruto how clones work he states that all the experience and mental work are used. Fighting is a different thing, doing work is different. All experiences gained by the clone gets redirected to the user as well as the fatigue gained from the clones go back to Naruto, plus the exhaustion from maintaining the clones mean that he's probably knocked out for more than a day.
It's probably alot harder to maintain clones to do paper work rather than him doing it himself, also coupled with the fact that he has this weird obligation to do the work himself. I don't remember if it's in the anime but in the movie he refused Shikamaru's help because he believed its something only he should do as Hokage.
All in all though, whether the explanation actually makes sense or not, the writers chose this direction to make tension between Naruto and Boruto. Even after the whole Momoshiki arc (which you'll see later), Naruto slowly starts to take more time off to hang out with his family and spend time with them, splitting the work with him and Shikamaru. He doesn't use his clones because that mental strain would naturally drain him. Yes he has massive amounts of chakra, but he doesn't have unlimited mental storage.
