Same was said about Google when they started selling the Nexus devices.
Their defense was then "we wanted to show our Android partners what we considered the baseline Android handset experience".
It did work out quite well for them, all things considered - and has bettered the Android handset market experience. Most Android handset makers have trimmed down their "Cruft" factor considerably, with the exception of Samsung. Motorola, HTC, Sony and even LG have an experience that isn't *TOO* far off the vanilla Android experience lately. Samsung is still an unmitigated trainwreck of dopey skins and useless add-ons on top of Android, though. The new Motorola phones, you'd be hard pressed to spot much difference between Android on them and the plain jane vanilla experience, and they have won many fans with this.
A vast majority of people that bitch about Android being buggy and slow rightfully do so because all they have ever used is the crapware Samsung type TouchWiz UI garbage.
It worked well for Google and didn't harm the competition. Many people, and I am one of them - love the vanilla Android experience on the Nexus devices, I just never got into them too much because I always required a card slot for additional storage. I love my old Google Play edition HTC One, and I despised the plain HTC version with their UI.
MS is doing the same thinking with the Surface line, trying to pass it off as a "baseline standard" as to what a Windows tablet *should* be. Quite frankly, up to the Surface 3, I think they have failed at it miserably and I agree that they have done nothing more than creating friction with their long time hardware partners, but I'm sure they will learn this soon the hard way.
The Surface 3 is a far better device, but it's not going to take over the world. Most people find something like an iPad a far better option usage case wise, since a good chunk of people buy tablets as consumption devices solely. There's a market for the full Windows experience on a tablet, but it's a small and very specific market - the enterprise market, really.