GS is about saving as much energy as possible while HS can be described as spending as much energy as possible, but there are still special exercise techniques involved with both.
Dialing up one and dialing down the other so they "meet" in the middle doesn't make them the same or "converges" them IMO, because you only end up with the same energy expenditure but not with a "mixed" technique.
I can dial down my HS snatch from a 10 to a 1, but my heel still doesn't come of the ground, the KB path (looking from the front) is still a completely vertical line and not slightly diagonal, my legs are still not almost completely straight during the hinge and I still have a significant "punch up" towards the top of the movement - in short it's still a HS snatch.
On the other hand I can put more ooomph into my GS snatch, but it wouldn't look like a HS snatch.
What I'm trying to say is, if you'd take someone who's only ever done HS (let's say snatches) and you just tell him to do as many reps as possible he would stay with his technique, just with less tension etc. He wouldn't naturally start to use a GS snatch instead. Conversly if you tell a GS guy to snatch the heaviest possible weight he wouldn't instinctively use HS.
IMO for the styles to converge at some point this would need to happen naturally/instinctively, but it doesn't.