This is IMO a major problem with current folder line-up. Every folder has to be capable to double as axe, so they have the grind of an axe.
And no, it seems to have no relation to the pattern of the knife. Because if it is illegal to have a locking knife, you still need one that can split wood, right?
Never really gotten the "hard use knife" craze. I also never seen someone using an expensive knife on a job-site (commonly they carry a Hultafors/Mora or something with exchangeable blades).