If I get breached as a result of using gentoo, it looks bad. If I get breached using Ubuntu it’s at least along the lines of ‘well everyone else is using it anyway’. Semi safety in numbers, semi ‘nobody got fired for buying an IBM’.
It wasn’t my call, and it’s a defense move rather than an opinion on the state of Gentoos security. I know they take things very seriously, but my assertions aren’t enough to make my employer feel comfortable.