is this true, you can't SEO a forum. Read this

[platinummack]

Someone said You cannot SEO a forum as the thread titles will be related to users, not you.
So what are somethings I can do besides title, mega tags, description?

I am using Simple Machines forums. I am promoting my Forum on social media, via my website, and getting members, but is there any way to leverage SEO? Any forum directories?

Thanks

M