Absolutely; no one uses Office because they can "quickly pick up any of its applications". People use Office because they already "picked up" its applications. LibreOffice? Lemmee see here, I'm a bookkeeper/lab research assistant/factory supervisor that just wants to get my shit done and go home. There's this FOSS thing that mostly works but sometimes doesn't, or this Microsoft thing that I already know how to use and "works" perfectly (because it for sure can read its own format), and I don't give two poops about "Freedom!". I'm going to send a requisition to the boss for another Excel license.

For a lot of people, they don't want to learn alternatives ('cuz that's on my time, since they boss ain't training me), and the cost of the license isn't coming out of their pocket. Of course they use Office. That's not an unreasonable choice.