I found it odd as well but I think it's because it implies that the theoretical reason for that lower bound may be invalid.
There's likely going to turn out to be a different theoretical lower bound for some other reason but right now we don't have that theoretical reason.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.