This is great to see and I particularly like your rebuttal of the claim that individuals 'feel pain differently'. It's all a distraction from the central issue, which is that the pain management aspect of this and related procedures simply hasn't been prioritised. We can speculate on why this might be.
The option of GA should always be offered up-front while the alternatives are as unacceptable as what you describe here, which is in keeping with what I've heard from women I've spoken to. I do think your point that the location of where gynae procedures are done is also a significant one,