The chances of a tablet smacking your face are minimal. However I have had my iPhone dropping on my face several times.
I think you must be doing it wrong - never happened to me.
Put a pillow under your head - I guess you lie flat, hold the phone up and then when you fall asleep the inevitable happens...they should add a warning to the instruction manual.
Just a thing I noted about my Mainland Vivo pad....
That it had no Google and I had to install Play Store, Chrome etc. everybody knows...
With the pad came also a browser, which I don't use, however, with that browser I can't go to sites that would never go to anyway, like XHamster and similar. Probably the browser uses Baidu as search engine... Okay, I might can switch that, I don't use that browser anyway.
Next, I use google keyboard and do the swipe writing. I can swipe-write words like Duck or Ducking - but when I misspell, and lets say totally accidental the first letter would be a F - it still writes Duck. That's really ducked up.
I can type it manually though.
This said, I am still 100% happy with the Vivo Pad 2 - and still look for the 13" Vivo Pad 3 Pro (0.9" more screen diagonal)