Dog bark and baby crying detection are advertised features for SmartThings integrations. Door bell and door knocking are also included, this is surfaced directly if you hook the TV or sound bar into SmartThings.

I had to check this and it's true. Not saying Samsung or 3rd parties don't take advantage of any data they can collect, but the story the tweets tell is super biased against them. Here, the detection seems limited to specific pattens required for a particular feature.