The Free Software Definition mentions "user" 22 times and "freedom" 79 times, whereas the Open Source Definition has zero occurrences of these terms. It doesn't seem surprising that the user freedom message isn't getting through if you completely scrub it from the messaging.
IMHO the biggest threat to Free Software is the proliferation of open source software. And so the biggest threat to all the open source users/lovers is their own lack of a meaningful philosophy on licensing.
I'm sure you know this, but to be clear for readers: almost all free software licenses are also open source licenses and vice versa.
The canonical examples are things like the BSD licenses.
See https://www.gnu.org/licenses/license-list.html#GPLCompatible...
> This is the original BSD license, modified by removal of the advertising clause. It is a lax, permissive non-copyleft free software license, compatible with the GNU GPL.
I think it would be clearer to say that the greatest threat to free software is the proliferation of non-copyleft free software which can be closed down if a company so wishes.