I am a sysadmin and we will enable this. This is because many meetings discuss confidential or strictly confidential information that must not be leave the meeting. In-house, you would simply hand out papers that you collect before concluding the meeting. In Teams meeting it's not possible hence you block people from creating screenshots. This requirement comes from legal and compliance, and many other positions from CEO downwards.
The lede you're burying here is why a lot of this confidential info is so. Yes, protecting IP is important, but you're also primarily targeting whistle-blowers, abused employees, discriminated against employees, etc.
I mean, if HR says they won't make an accommodation because they think you're faking your disability than it's as if it never happened. Less transparency always benefits the immoral.
And this type of stuff does happen. A lot. We don't hear about it because:
1. Companies have gotten really good at just covering their tracks, like this.
2. It's a lot of effort to fight back and it's almost never worth it. You pretty much need baby killing material for someone to whistle blow. Lowly transgressions like discrimination aren't worth the effort.
I thought after Blizzard this would be a sort of wake up call.