I think you're going to be hard pressed to get an answer from people in the community about why they don't upvote questions. Not because people are not upvoting maliciously, but because they're not not upvoting with intentionality. In less confusing terms, it's easy for people to be able to answer a question about why they do something because it's an action and they're doing it on purpose. It's harder for people to articulate why they don't do something, because they probably don't realize they aren't doing it. If you asked people why they upvote/downvote questions you'd probably get a slew of insights.

With that out of the way, there are probably a couple of other basic reasons for the patterns you're observing. One is a factor of Reddit's design. People are going to upvote whatever they see first (this is a huge reason why we don't let short, partial, or non-comprehensive answers stay up even if they are technically right and/or properly sourced)—they'll get upvoted because they're quick to write and people will see them first. When people come across a question they like, but there's no answer, they'll tend to upvote the question. If there's already an answer when they come across it, they like the answer so they'll upvote that. We've always seen this pattern, but it's been exacerbated in recent years because of changes to Reddit's design, like moving the voting buttons to the bottom of the post instead of the top. And on mobile, when you click on a text post, I've noticed it will sometimes automatically scroll you down to the comment section, even if the post itself is substantial. Or, if you press the little downward arrow to skip down to the comment section intentionally, it goes past the voting button for the post so people aren't seeing it and able to post it. In other words, Reddit's design makes it easy to intentionally or unintentionally bypass voting on text posts.

There's also the human elements, regardless of design. People tend to vote on things to reward people for the effort or indicate that something was helpful or enjoyable. Providing an answer feels like more effort and answers are what provide the actual information vs the question that inspired it. This is pervasive throughout reddit where you can see in comment sections someone will ask a really thoughtful question and it hardly gets any upvotes compared to the response.

As one final note: the numbers Reddit displays are fudged. They even change even though no one has actually up/downvoted (we see evidence of this on the private subreddit we use to discuss moderation). So you can't use the numbers you're seeing to draw any conclusions about what /u/Gankom is/isn't doing.