>>EdScho+Oa
For me, the value in having a bin vs sbin split is in keeping system binaries (daemons, root-only tools) off the user's path. There's little value in a user starting inetd or apache2 from the command line, so why should those be present in the user's path? Same thing for system management tools that require root access for everything, such as dmsetup, blkdiscard, or shutdown (yes, Linux examples as I don't know FreeBSD).
Having only usable binaries in the path aids discoverability of the system.