Earlier quoted context omitted.
Why shouldn't people use putty? I still use putty because it does what I need for it to do. No need to change just because MS has their own terminals application, which besides I far from trust.
You trust them to run the entire OS and every stack included in it, but not to make an ssh client?
But there's also trust in the rely on sense. Which at least I try to compartmentalize. I can trust Microsoft (or Google) to make an OS I can rely on to run other people's apps. If Microsoft or Google want to provide apps, they'll be evaluated as they are, not with a bias because the OS provider shipped them.