It's justly rated, I'm surprised the MC score is as high as it is tbh. I'd put it in the 75-80 category myself. The thing Turok had going for it was it came at a time early in the N64's life where there was a dearth of software, especially quality 3rd party titles. Most 3rd party games at that point were not all that great or just rushed ports from the arcade or other consoles.
Turok was also supposed to come out around the US launch of the N64 but got delayed to March '97 due to bugs and other issues. It would've made for a helluva 1-2 punch if it had launched alongside Mario 64 and had a full year at retail before GoldenEye made it almost completely irrelevant. Turok was a breath of fresh air for its time, but it has not held up very well over time, as is the case with many games from early in the 32/64-bit gen.
Yup, there was a limited amount of software available at the time so people who weren't necessarily interested in first person shooters still bought it and were ready turok.