Theories in medicine are meaningless without data.
I know its different because it relates to an approval process, not a court decision, but this case makes me think of the German decision not to give the Oxford vaccine to over 65s.
Germany have made their decision because they believe current evidence doesn't show the vaccine to be effective, however as other countries will continue to use the vaccine that data will become available, and presumably their decision could change.
Regardless of what we think, the UK court decision does not prevent other countries from using PBs on young children, and if more data becomes available to prove that their decision was wrong, presumably they would change their decision (assuming the appeal is unsuccessful). However, for that to happen, there would need to be a will to collect data and allow research - and at the moment that seems to be a stumbling block.