It's only FUD when comparing with a similar non-open-source piece of software - i.e. Postgres vs. MSSQL, Apache vs. IIS, OpenOffice vs. MS Office.

A standard shrink-wrapped version of the for-money options doesn't come with any kind of support that the open source versions don't have.

But when comparing e.g. GitHub with Git+Linux+SSH+Nginx+Python+Trac+.... it's completely fair. And that's one of the easy setups.