What you have is an unconfirmed hypothesis, a guess.
We fully agree on that.
My point is that guessing is good, because it allows hypothesis. But we should not stop there, and we need to confirm the hypothesis. Data gathering is one way.
For this thread, I can only contribute with my own anecdotal personal experience. I have weightlifting shoes. I bought them instead of powerlifting shoes, because I also plan to do more olympic weightlifting, one day.
I have used them for squats, and am happy with them but:
- my stance is not super wide as in powerlifting competition, but about shoulder wide;
- so my shins do not stay vertical (about above the toes at the bottom of the squat);
- I use a low bar position now, and have used a high bar position before (while thinking it was low bar...);
- my squat is not very heavy and very far from powerlifting standards. My current tested 1TRM is just around 1,7 BW.
I like the shoes because of the perfect stability when I wear them. Much better than converse-like shoes.
The other feature (elevating heel) is less critical
for me. I am a special case, because I have very flexible ankles. I have not noticed differences in the mechanics of the squat with or without them. On the other hand, pistols are way easier when I wear them, so there is obviously a difference.
It triggered my curiosity, though. I will video myself this month, squatting with or without the shoes, and analyze the mechanics.