The fans do run but, and to be fair I’d expect them to, but I‘ve never had a CTD.
The game really is a GPU hog so the 5700 XT should certainly be worth it. I say ’should’ but I’ve not yet reached 8GB of VRAM usage because the raw power of the GPU gives up first.
There’s no way it will run at 4K unless you turn the settings right down, which really defeats the object. 1440 is a good compromise with High settings.
As to processor, there’s some evidence that the the i7 may actually be better. The sim won’t use all the cores of the i9 and the base clock speed of the i7 could actually be a benefit. This comparison may help.
I think the 5700XT and i7 may be a good setup. I would love to see benchmarks between the two.