The only solid argument for hdt is price. But even than if you search well you can find non-hdt alternatives priced similarly.
I'm not sure what coolers are you talking about that don't have grooves inside the baseplate beside Scythe which btw offers great value for money.
Don't mistake a marketing gimmick with something that really works. And a decent hdt heatsink, ie Thors hammer, is not very cheap: