So, I’ve been asking myself what “legitimate interest” is supposed to mean.
I think the intent of the law is to have those cookies be the kind that the website needs to work. For example, they might use that to store which cookies you chose to enable
Companies actually don’t need to ask you to allow cookies which are strictly needed for the site to work. They will usually still show a category “required cookies” as part of the cookie list but you generally can’t disable them.
However, the “legitimate interest” stuff is usually deselectable and paired with another regular check box for the same third party.