Instead of saying there's nothing that could have stopped they should tell us that it's unlikely nothing could stop it but a chance that after further investigation you could have a medical condition that CAN be fixed that will prevent miscarriage in the future - and point you in the direction of privately getting tests and explanation nhs test start after three miscarriages.
I agree with this actually.
But, this is not the same as saying "it might be because you drank too much coffee, ate rare meat, had a glass of wine or smoked before you knew you were pregnant".
I think many people who disagreed with your op might agree with what you've just said. Blaming MC on a genetic disorders is not the same as blaming it on too much coffee. I appreciate, that in graphista's case, she found that the medical treatment she received PLUS she (and her DH?) giving up caffeine and obviously alcohol for a good while before TTC made a difference. But, for some people ONLY medical intervention or medication will make a significant difference. The caffeine and alcohol are just good things to give up if you're putting serious effort into TTC, which you clearly are if you are being investigated for recurrent MC.
My friend has just done three rounds of IVF and she had to give up alcohol and caffeine too. And I believe her partner also stopped drinking alcohol.
It is probably mainly a cost thing that they don't investigate every MC. Because miscarriage is sadly so common and almost always is a case of "nothing else you could've done", they probably feel as if they have to say it, because to say otherwise would result in people demanding to be tested for genetic disorders when they have had one MC. Horrible as it is, they will have decided that is too costly and tbf, an unnecessary procedure to put every women who suffers a single MC through.
But it goes back to what you and others have said on here op. Why do they disguise the truth instead if just explaining that to people? Are we so unreasonable that we wouldn't accept that it probably isn't worth testing right now, but it is a possibility that in the future they will test.
Although, even though I have never personally been to the GP with a MC, (I think I had a very early one, but it really was just like a late period with some other mild symptoms), I did actually know that after three miscarriages they will test you for certain disorders. So I don't think it's a secret that sometimes there is another issue which will eventually need to be investigated.
I bet in America they investigate sooner, but, (as a baby born prematurely in America myself, due to an overzealous doctor intervening when it wasn't necessary), I don't know how much of a good thing that is.