Given that professional groups on social media involve people discussing topics linked to their profession I think it's fairly reasonable to conclude they're linked to Cornavirus in some way.
Coronavirus is kind of a hot topic in general, on every form of social media, and many of us are now talking to colleagues via social media instead of in-person. They might be in a profession that is related to this, but they might also just be wondering about all this and want to canvass the opinions of their usual colleagues.
Either way, in the world outside of identity politics it's generally assumed that people are more than capable of having a discussion about an issue informally without needing to round up appropriate numbers.
Yeees, but sometimes in group discussions, where something important is being discussed that doesn't actually affect anyone within the group, one can see an insensitive tone developing.
Over the course of a discussion, participants can begin to treat an issue that impacts horribly on other people's lives as merely a matter of intellectual interest, because they don't have a stake in it. If you are a lurker or come in to the thread when it's halfway through, it looks far less like 'objectivity' and more like horribly distasteful intellectual posturing.
I've seen it with a fair few issues, and probably participated in it myself at other times. (Although I try very, very hard not to slip into that kind of thing now.)
Anyway, it may be that which the OP was reacting to.