LibreOffice supports this and it works quite well. I would guess most people prefer google drive these days, though.
>using Bluetooth
Do you actually know anyone non-technical who has used bluetooth at all in the past 5 years? Or technical for that matter, I've used bluetooth maybe 3 times in that time frame and always had no issues on Linux.
>playing AAA games
This is your only legitimate point, but it grows less legitimate every day.
>printing and scanning
Works fine OOTB for nearly all printers and scanners using only GUIs to configure and use the devices.
>connecting to external monitors
This has worked perfectly fine for at least 10 years...
>watching DVDs
Also works just fine.
>transferring files from their phones
I do this all the time. Works OOTB on popular distros.
The real problem is that people are change averse and that people like you spread uninformed FUD. Cut it out.