What are average users? That's a really broad term. For example my parents and friends are considered average users and they all do their diligences on a web browser. So can they switch to Linux? Of course. For school learning about Linux and having to hand out work as a Word document hasn't been a problem for me just use Microsoft 365 no problem at all. Adobe suite? Well there is plenty of tools capable of doing the work as good as you just have to take the time to learn them ,I agree on this one with author. But in reality I think we should all move away from Adobe their subscription is expensive , most of my classmates at my community college can barely afford a laptop to run Photoshop so it will be great if schools start teaching FOSS apps. If you are using keepass XC you can copy and paste a password and if you don't want to deal with that use Bitwarden been using that for years. Virtual Manager is so simple to install and have a Windows 10 up and running in less than a hour.
I am a casual gamer and been able to play GTA V , Cyberpunk 2077 , Red dead Redemption 2 , Wildlands , Far Cry Primal , Spiderman remastered , Stray on my PC with little to no configuration.
Imagine Windows eventually charging you a monthly subscriptions and still collecting your data adding useless features like AI that will collect more and more data , to serve you better according to them. I don't want that , that's why I move from Windows to Linux. Was it easy? No but it was worth it :) to have the control back and the privacy I wanted.
Oh great I am a hacker now because I installed a modified ROM! I will go to my boss and ask for a promotion.