It doesn't matter if you're good at it - there is no evidence that being good at chess makes you better at any hedge fund related tasks or vice versa. However you should most definitely care if your employees like what they do and the environments they are in. Those who dislike some critical element of the job may be perfectly capable of doing it, but will have a very low barrier to jumping to other opportunities compared to someone who genuinely likes the job.

Let's say you're hiring people to work a fish market. One candidate loves going out on the boat and fishing in their spare time, the other hates the smell of fish. Both are fully capable of doing the job, which doesn't involve catching fish or being on a boat, but which does involve spending a lot of time with dead fish. Who do you think is more likely to stick with the job for an extended period of time and be pleasant to work alongside?