Part of the confusion comes from what the rules are written for.
Agreed
It's quite often a certification vs exploitation confusion.
Another example being the GA approach climb 2.1 % climb gradient requirement which is a certification one as opposed to the 2.5 % climb gradient imposed by OPS 1.510 for approaches with Decision Heights lower than 200 ft.
On a side note, about that particular last point, Jeppesen doc seems to use the 2.5% climb gradient requirement as a standard figure for any type of approach, whereas even Cat 1 approaches are not subjected to it (their DH's never being lower than 200 ft). Hence any Company using exclusively jeppesen figures in this particular case potentially penalize themselves unnecessarily.
While I'm at it, here's another one:
About the previously discussed points of take off gross/net/penalty climb gradient in the scope of obstacle clearance, I've failed to find any penalty requirement when it comes to GA obstacle clearance requirements. Just would like to have a clear confirmation that they actually don't exist.