I hesitate to write something about this, because what you understand by style and technique is probably something different as to what it is in tango.
Some things about technique are universal. Not jerking to push the womans shoulders "back" is a technical flaw in all partner dancing. The follow being a complete noodle is also a technical faw.
I just googled "technique ballroom" and found this...
Notice I am not mentioning foot rise or body rise as a
universal technical flaw. Some technique is related to the style of the dance and what is valued. Other things: nope. Absolutely not.
It's all well and good to recognize that people in different areas will call some things technique and in other dances they may merely be "style". But I think I've been pretty clear listing which sorts of things I consider technical problems in all partner dances. They are not the things you found on google.
If you think something I have listed as a technical flaw is not a technical flaw, perhaps find it on the forum and explain why what I think of as a technical flaw is ok in tango. I'm obviously not going to defend claims I didn't make-- and in this case, I think I am being asked to possibly defend claims
no one made. I sincerely doubt anyone in ballroom is going to decree 100% of requirements for excellent standard ballroom technique must also be "technique" when applied to AT.
On the other hand, technique for us includes balance, body dynamics, flowing movements, projection.
Balance, body dynamics, mostly flowing (not jerky) movements and what you call projection are also technique in ballroom.
Technique also includes not bobbing your head when walking and always staying at the same height.
Generally also in other partner dances-- for some basic reasons having to do with physics and anatomy.
Foot rise, on the other hand, is handled differently by the tango styles, so it is not part of the technique.
As I said: I have not discussed footrise as a universal technique thing. So no: I am not making that mistake. (I doubt anyone is.)
You probably know that I often provoke the sworn milonguero stylists in this forum with my matra: Lean is an illusion.
I don't specifically remember your mantras on lean. But I have not said much of anything about lean. I have said that one partner putting too much weight on the other is generally a problem. Great partner dancing generally requires agency on the part of both partners. I suspect this could be stated in terms of "lean"-- since way too much lean (as shown in your surely ironic cartoon avatar) would probably make it difficult for the couple to truly move on their own.
In my tango environment, the milonguero style was always the retreat of untalented dancers who did not have enough core muscles to be able to hold a bent-over posture on their own. In such cases, the definitions of style and technique unfortunately coincide. (And I hereby also apologize to the dedicated milonguero stylists who are technically capable of holding a tilted axis as well as dancing in other styles.)
I'd have to see videos of those you call untalented dancers with poor cores vs. the ones you think are talented to fully understand what you are trying to say. If you show some videos, perhaps we can all see precisely what you mean and judge whether we think that "style" and "technique" coincide.
Maybe you can poing to some videos to compare and contrast. (I think I am not the only one interested in making these discussions of technique vs. style more concrete though use of video.)
I do think it is the case that poor technique interferes will many attempts at "style".
I have no dog in the race between the milonguero style vs any other style. My guess is that if I was shown enough examples of both, I would find there are people with terrible technique in both camps. There would also be people with great technique in both camps. And I suspect even though I don't AT, I could point out some flaws that are simplu universal flaws no matter which "style" the person claims they are doing.