That's my understanding, yes, though the world of fidelity bonds is also nuanced, and there are various kinds. Some people in that space argue that timelocking a large amount is the same thing, economically, as burning a small amount, because both involve sacrificing some value. I suppose the argument is something along the lines of "time really is money."

Maybe both abort transactions should have a 1 month timelock that locks up double the order's value for that period. That would discourage either party from griefing just to be trollish. If the abort transactions are both painful to use, neither party will want to do that.