@ Dozy, I am gonna go with Ian W on the weight-on-wheels design consideration.
If you want both < 60 knots and WOW, a simple "and gate" works. If you want either, then the "or gate" works.
OTOH, seems the 'bus and other heavies use WOW for spoilers and such after touchdown, or am I off base? I'll bet most pilots would like the spoilers to be active above 60 knots, as they wouldn't do much to shorten the landing roll below 60 knots, ya think?
I also question the alpha protect sub-law that attempts to fly the plane at the alpha protect AoA when the stick is released/neutral versus the basic one gee command.
And there are other puzzling features I have seen in the manuals regarding the reversion laws.