And this is a matter of subjective opinion
But the judge has had to make an objective decision, based on the evidence.
There is no possible way any of us knows what the least distressing thing will be for this woman, short of manipulating time.
Obviously. But, again, maybe the doctors who know her and who have the required expertise, and the judge who has been given all the facts, have a better chance of assessing what is likely to be the least distressing option.
Nobody has to make the decision to terminate at all!
Yes, they do, because there is a strong body of opinion that it is in this woman's best interests not to continue the pregnancy, whilst her mother thinks otherwise. The court has to decide on that. It can't just refuse to do so in circumstances where it has evidence that allowing her to continue will or is very likely to be harmful to her.
There isn't a legal process with every pregnancy to determine whether it should be allowed to go ahead or not.
Obviously. Just as there isn't a legal process with every other medical procedure to determine whether it should go ahead or not. However, there is a legal process to make that determination when there is a dispute about the best interests of a person who lacks capacity.
You could have simply had a judgement or intervention from professionals to manage the ongoing pregnancy with support.
But the professionals also apparently considered that this would be more harmful to the patient.
Remember, the one thing they cannot manage for this woman is to accede to her wish to keep her baby.