If you are absolutely repulsed by doing anything clinical, I would advise against getting the MD in conjunction with the PhD.
However, the MD/PhD degree does open more doors than a PhD. PhDs are a dime a dozen these days. Blame credential inflation. But if you don't see yourself using the MD at all, why get it?
Look, the MD will be valuable in that you can apply for grants that PhDs can't touch. But is that worth going through 4 years of med school and then residency?
Essentially, the question really becomes...Is the MD worth getting in YOUR life given YOUR goals?
I've grappled with this question...but alas, it's 7 years too late for me now.

For me though, I don't regret getting the MD. I'm glad I toughed it out.