I don't think voting is at all unhealthy here, and I do positively encourage folks to remember to up-vote great content.
There's a niche aspect that might cause folks to hold back a bit on answers, because exceedingly narrow sub sets of people really are the only ones that know if the answer is helpful or not. In order to vet certain answers you'd either have to Google the heck out of it, or actually go there and see for yourself. I thin a bit of that might be at play, but I'm not overly worried about it since we've got users steadily climbing the ranks and unlocking privileges.
I tend to give what appear to be well written and thorough answers an vote, even if I'm not entirely sure the post is 100% correct (but seems to be from the searching I did) - but I don't know how many have that much time to put into browsing / voting on content.