This is where you're posing the question in a stupid way deliberately to make it look like your iPad does most of what most people need. It's not that there is a single thing that "most" people do. I doubt there's anything at all that "most" people do at all except eat, sleep and ****.
The fact you're trying to hide from is that "most" people do something that an iPad can't do. It's just not the same something.
If I say people need to develop in xcode, you'll say they're a minority. If I say people need to edit 4k video or photos on a big screen, you'll say they're a minority. If i say people want to play high end games or even use a VR headset, you'll say they're a minority. If I say people need to do modelling and high power number crunching, you'll say they're a minority. If I say people need a robust file system, you'll say they're a minority. If I say people want to install software that is not pre-screened by big brother, you'll say they're a minority.
But, sooner or later "most" people need to do something an iPad can't do.
