It’s two things. 1. Less eyes are on the bsds

2. Bsds don’t have the same optimizations that Linux has. Bsds generally try to pursue corrrectness

That being said there were just a bunch of vulnerabilities in freebsd

macOS has had its own dirty cow attack and I know there’s for sure more memory ones just based on the way the xnu kernel works.

So no Linux isn’t really worse per say