Funnily enough, you don't have to pause to change weapons. This is a more common misunderstanding than you would think.

Do people actually do that? Pause the game to switch weapons? I mean how you quick-change weapons is shown on your screen in the upper left corner.

I bet dollars to donuts that if Jim gave this game a 10/10 you wouldn't begin to question his playtime. The fact of the matter is that we don't actually know how much he played this game other than that he sunk an indeterminant amount of time in the days leading up to a 2-3 day period where he sunk the majority of his time.  That could still result in 40-50 hours of play time overall. Ironically, Jim could have played the game more than the majority of reviewers that gave the game a 10/10 for all we know.

So the review came out on the 12th. That means he probably had about 3 days to complete the game (half day 9th, full 10th, 11th, half day 12th, assuming he's writing while he plays). Apparently the average completion time is around 30-35 hours (https://howlongtobeat.com/game.php?id=38019). So if he already had 5 hours into it before the 9th (let's say), and put another 25 in over that 3 days, then would he have "rushed through the game" if he beat it in the average amount of time he take to complete the game?

To quote Jim's review:
" Enemy encounters that suck up your resources, cluttered menus that are a hassle to get through, the same old fucking cutscenes every time you open, enter, and complete shrines. Frequent interruptions when monsters respawn during a “blood moon” – the modern equivalent of Castlevania II‘s notorious “curse” text box."

I'm sorry, where does he say that the cut scene is unskippable during a blood moon? Are you sure that he got this wrong, or that you just never read it right?

If you actually read the review you would see that he does discuss his issues with the game, if that deserves a 7 who knows. 

Don't simply say that he did it for the clicks.

Well technically the game still pause...

Yeah, it can certainly work well depending on how they implement it. I've enjoyed it in some games I've played, like SaGa Frontier 2, while I felt that I would have enjoyed the game more without it in others. I like the sound of being able to take weapons from enemies in Zelda, and throw the ones you've used up. What percentage of enemies in the game carry weapons you can take from them?