There is a bit more to that study if you read into it better. Studies that are well done attempt to exclude personal bias which doesn’t make for an exciting read. While I sarcastically agree with the hypothesis, it’s not the result of the paper. (Some correlation may still be measurable and presented, but that doesn’t make the hypothesis statistically significant.)

However, to our knowledge, no lesion work has yet directly examined the link between dlPFC damage and political ideology.

Specifically, we examined ideological extremity on general, social, and economic dimensions both as the absolute distance from the ideology scale midpoint and separately for those on the left versus right on the ideology scale. However, we failed to observe any statistically significant associations between lesion type and any of the indicators of ideological extremity, …

We all need to be careful when presenting studies. I didn’t even do a proper level of diligence with this one, TBH. Studies need to be repeated by independent teams, sources need to be verified and sample sizes need to be taken into account. It takes time consuming work to accurately use a study in a discussion.