Agree on privacy. And why bother when Intel/AMD have their Management Engine (ME) and AMD their equivalent.
But why support a company like Microsoft when they have a long history of prioritizing profit over user freedom (FOSS/EEE), security and privacy?
By all means use it if it suits your needs 🙂 My point is that there are alternatives, like fx Lenovo Yoga or similar, where you dont support Microsoft and their history of bad behavior.
We all got different priorities and if it isn't something on your radar, that's fine. For me I would rather be without than buy a Surface for the mentioned reasons.