I don’t know what average people could do to break their system, considering nowadays, it is practically impossible to break anything if you are using Software Management tool your Distro gave. I don’t say I don’t believe you. Something could break. But I suppose you are trying to do something that average Joes would not attempt.
I installed Linux on my coworkers, friends and families, and nothing break. Heck, I even gave my friend Arch Linux. I told them to only install thing from the Store and never touch command line without talking to me first. It’s been 6 months.
Linux for average people is been there. It’s ready. OnlyOffice is just like Ms. Office but Open Source. If you are willing to learn, LibreOffice is far better than Ms. Office. Linux supports all browser. KdenLive and Krita work better in Linux. GNOME is way easier to navigate than Windows, with superior gesture and beauty Windows could only dream of.
Windows has its perk, but saying Linux is hard is no longer true.