You literally can't make a mobile phone today without having support for all Google services. Native support is better than 3rd party. And now all of your user's data is in Google's hands.
Yes, there are some extreme ... fanatics(?), who can live with a phone that doesn't have YouTube, Gmail, Google Maps, Google Drive or Play Store in it, but the Joe/Jill Regular will never ever go for that today.
Of all the companies beside Apple, Samsung is the only one I can think of with the muscle to maybe do a device with all of their own services.