Voting is at least to some extent about popularity: questions which get lots of views are more likely to get lots of votes than those with fewer views. Highly complex technical questions don't attract as many views as more accessible questions, so some of the most tricky and perhaps 'insightful' questions attract relatively few votes. At the same time, some basic or indeed 'fun' questions attract a lot of votes.
Voting is meant to be a 'low cost' activity, which in general means if the question is clear and seems to be answerable upvotes can be expected. In the current case, I think that is probably the case on balance, and certainly this topic attracted a lot of interest. Thus a high number of votes is to be expected: it's not meant to mean it's the best question on the entire site. (I'm not sure how you can quantify the 'best question': for a beginner, some basic questions should score highly, while for the experienced TeX user something much more low level, say about the OR, might be much more 'interesting'.)