I think downvotes on facts and upvotes on feelings is just people wanting to feel validated, but not having the energy to engage with content. It used to happen on reddit too a lot. A lot of communities there are based on dealing with human emotions and situations in life. People seeking advice and validation about their lives being the primary motivation for even creating an account on the site.
I have a little pet theory backed by some reading that people are overstimulated by junk content to the point where they just can’t meaningfully engage in serious discussions anymore and that leads to the phenomena of populism on a political scale and simple, emotion-based upvoting on a Lemmy scale.