If you're buying cars based inversely on how much money the company owner has, you're implicitly ruling out a lot of good options. It is using the language a bit loosely but in some relevant sense we'd expect people who make the most cost-effective products to make the most profit.
You know one CEO but not the others. The others could be worse people overall but they choose to hide it. So you make a decision based off a known bias.
I don't think you're irrational for making this decision, it's just interesting. It's something I've never done.
Ages ago now, 2009, there was an advertising scandal about Toyota: https://www.fastcompany.com/1390534/toyota-terrorizes-consum...
It's stuck with me ever since. I can't feel comfortable with the idea of buying a Toyota, knowing it might encourage stuff like that.
And I have absolutely no idea who their CEO is or was, even though that's just a quick search away if I ever need to actually find out.
The cult of hate seems a lot more like a cult than the alleged cult of personality. This post and comments like yours only make it more apparent.