It is a totally worthwhile and useful bit of tech, unfortunately the scumbags have it and so you want to disable it because you don't want them to benefit even though they are giving you something useful in exchange.
I use gmail from time to time, and YouTube, but literally everything else I do on the computer won't be visible there.
What would be cool would be to ask "What documents about ICs did I have open last night around 23:00?" and have it give me a list of local paths that I looked at, and it's all outside of browsers/Google. And of course, have it all be local.
At this point, Microsoft should be treated as a threat to society and the individual, and we should probably start shunning Microsoft engineers & executives from public spaces.