2 thoughts:
"I can’t imagine what it is like for bereaved parents who have recently lost a child. Or for those struggling with fertility issues." I am in one of these groups and very close to parents in the other. I can't speak for everyone else but you don't correctly imagine any 'pain' for us caused by the accommodation of other people's children.
Children are people too and deserve to have their needs met. We often build digital services to address the needs of minority user groups, because it's the right thing to do - if asking to have the 'children' option off by default, why not demand content warnings are also off? You're not photo-epileptic or had a problem with substance abuse (or worse) so why should you have to see those warning captions each time? And what about sub-titles - that get's a button right on the play screen but 'only' ~17% of the UK population has hearing impairment.
Sorry - writing at speed in my lunch break. Love reading the blog. Respectfully disagree today.