That may be. However, your statement regarding "Yin-branches" seem to be "quite limited and simplified." "The stylist is more prone to strike, or in other ways go, right against the opponents strength while maintaining a superior structure" is only one strategy, per He Jinbao
.
I wrote "For instance, in Yin-branches, the stylist is more prone to strike, or in other ways go, right against the opponents strength while maintaining a superior structure."
I know that there are many different strategies in He Jinbaos branch. I didn't say one branch or his branch, I used plural. But also I didn't say all. It's you who generalize it into one single school. Also I didn't mention strategies or theories, I said what they usually do, or prefer to do. For Yin bagua, my experience, first and second hand experience (though not very vast), says that many stylists of different Yin branches prefer to attack straight on with a superior structure, instead of what Cartmell expressed as standard. If you understand the learning steps in Yin branches (though they can be very, very different), for instance what is common in He Jinbao's school, I think you can figure out the logic behind this reasoning.