Bash is distributed by GNU, not FreeBSD. FreeBSD distributes instructions for fetching, compiling, and packaging Bash (the ports tree and the Makefile for the bash package), but that is not the same as distributing Bash. Additionally, Bash is developed by GNU without being sponsored by FreeBSD; it is neither first- nor second-party software, leaving third-party software as the only option left.
To assume otherwise would have to assume that all ports come from FreeBSD and that's a bit absurd. I don't think anyone's going to say that Bash, or say KDE, is a "FreeBSD project" any time soon.
And all that just to point out that /usr/local on FreeBSD is intended for non-OS software installs (it's not the only option you have on the system, /opt isn't unheard of, but mixing up /usr/bin with non-OS software is a fast recipe for disaster).
To assume otherwise would have to assume that all ports come from FreeBSD and that's a bit absurd. I don't think anyone's going to say that Bash, or say KDE, is a "FreeBSD project" any time soon.
And all that just to point out that /usr/local on FreeBSD is intended for non-OS software installs (it's not the only option you have on the system, /opt isn't unheard of, but mixing up /usr/bin with non-OS software is a fast recipe for disaster).