The argument is that there needs to be some real thought about who we demand gets training. You, and many others here, seem to be saying that anyone who might possibly come into contact with anyone vulnerable needs to have this training. Well - that is everyone. That's not a reasonable approach.
Maybe in an ideal world, we ALL have ALL the training. Every person who is not a hermit gets first aid, food handling (just in case), mental health first aid, DEI, whatever they are calling the do-not-sexually-harass people training these days, administering naloxone training, and more.
Except that's not really reasonable. You need to actually fit what you ask of people to their role. It might make sense to ask people doing the tea and food to get a food handling course. Or maybe even first aid - though in workplaces often the requirement is a certain number of people per shift should have some of these kinds of courses, not everyone, unless it really is directly their job.
Someone said volunteerism is being killed, and that is true. It is harder and harder to get people in these roles. And part of the reason is that there are more and more demands on volunteers to tick these boxes. It takes more time, it means people have to make themselves available at other times, etc.
There 10 minute online courses people are talking about are not doing much, if anything, other than ticking a box for the insurance company. It does however put barriers in the way of someone stepping up to do a simple job.