Why wouldn’t you? They’re super convenient, being small and lightweight, with high quality keyboards that make them more laptop like, plus they support standard USB and Bluetooth keyboards. They aren’t full laptop replacements, but basic office productivity tasks they surely are, and have first class support from Microsoft office, google docs, and Apple’s office tools. In a meeting for example, they can be used to take notes, and then quickly screen mirror to a TV wirelessly or with a wired adapter and be used as a drawing tablet for sketching ideas or drawing diagrams. Extremely versatile, there’s nothing really like it (well, besides other tablets).
They certainly don’t replace a real laptop in all aspects, but they do for most people most of the time, hence why it’s common for people to use smartphones and tablets as their only computer.