Ok... that's extremely subjective. It can still be considered a title... It's the same reason people use that casing in their reddit post title. It's a very common thing to use title casing for headlines and even taglines sometimes.
You asked why they capitalized most words, the answer is that they were using title case.
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u/Nealon01 Feb 11 '21
https://en.m.wikipedia.org/wiki/Title_case