Yes, building something as complicated and locked in as Microsoft Word required a lot of work, and Microsoft has gained considerable money and power over it, but that doesn't mean that Word is necessarily good.
No different from "McDonald's hamburgers are objectively very good."
Most of the revenue for Adobe is not due to individuals who need a competent standalone tool. It’s for organizations that need all of the usual qualities:
1) continuity with prior work (my old projects open properly, last year’s training is still relevant)
2) being able to hire/train employees on the tool
3) collaborating externally
4) interoperability across work products (eg vector, raster, video, etc)
You are not getting any of that from someone’s vibe coded weekend project.
For a while I thought it was annoying that Word wanted to save my documents in the cloud but then I realized I could keep my lifestyle diary for my nutritionist in Word and update it on my iPad on the go and it works great.
This is a pretty biased take. If there is anything the world is finally learning, it is that being completely dependent (not only for functionality but also availability) on a single vendor operating from a potentially uncooperative government, is not a great position to be in.
Open source developers work on Linux. What you're saying presently makes no sense at all.
That is, a lot of us use plain text editors together with systems like markdown or restructured text or TeX. We never touch a WYSIWYG editor or if we do it is embedded in a web page.
If you look closely at how WYSIWYG editors behave (selections, cut-and-paste, etc.) you realize there is something conceptually wrong with the model behind them that causes them to misbehave, at worst they can seem like they are possessed by the devil. Word has problems but other editors, especially those ones embedded in web pages, are worse. I think plain-text editors in the open source world are fantastic but the WYSIWYG tools are awful... and plain-text tools are kind of a "blub" vs WYSIWYG tools, but you can live a great document life with them.
That being said let's keep in mind that the latest wave of moving-away-from-MS-Office is using OnlyOffice this time and I believe it might work. OnlyOffice actually wants to entice MS Office users. And thus it is more compatible, has a much closer/better UX, and despite being a web app it is somehow more responsive than LibreOffice.
I use Libreoffice and I ... objectively... find it slightly less of a pain in the ass.