The popularity of Windows is largely due to the fact it's pre installed on most PC's when you buy them, people literally think Windows 'is the computer'. Such popularity has little to do with Windows being a great OS. In many ways Windows is like McDonalds: It's not the best, it's not the worst, it just fills that hump in the bell curve.
Due to the fact Linux has no marketing department, it's unlikely this will ever change.
Windows comes pre-installed on PCs when you buy them because it's what people are generally comfortable using, because it's what they use at work too.
And Windows is used on business PCs largely because of how manageable they are at scale. Windows is expensive. Like, really expensive. If you have 1000 PCs that have Windows and Office E3, assuming a bulk discount, that's an up front cost of ~$200000 with the subscription costing an additional ~$20000/month.
If it was feasible for business to change to a free alternative, I guarantee they would've done so.
You're right in that that Windows is not some super great OS, but it does some things way better than anything else that make it an ideal choice for business use.
And Windows is used on business PCs largely because of how manageable they are at scale.
... Linux being manageable at scale is kind of the reason why Linux is the standard for servers. Many enterprises run Linux workstation distros, and they can be managed at scale just fine, it's just different tooling. You can deploy a Linux desktop OS with Ansible as easily as a Linux server.
You can replace pretty much the entire Office suite with Nextcloud and OnlyOffice, both of which can be easily hosted on-prem, for a fraction of the cost of paying MS for roughly the same thing on their awful infrastructure.
If it was feasible for business to change to a free alternative, I guarantee they would've done so.
They have. Just because you haven't heard about it doesn't mean it isn't happening. It's pretty easy (and inexpensive) these days to run Linux desktop OSes like RHEL, Debian or Ubuntu on a VM running on Proxmox or OpenShift, complete with multiple monitor support and GPU. Hell, you can even run a Windows VM if you want. All you need is a system (like a thin client) with enough grunt to run a browser, and enough ports to handle multiple monitors and USB accessories.
And businesses aren't interested in "free", they're interested in support, which they are willing to pay for. This is how companies like Ubuntu, Red Hat and SUSE make their money. The OS is free, but you can pay for professional support.
No, Windows comes preinstalled on most PC's due to clever marketing. As stated, it's more a case of people thinking Windows is the computer as opposed to any form of comfort regarding a fragmented touch/desktop UI making poor use of screen real estate.
I come across a number of Mom and Dad, Grandma and Grandpa types that outright struggle with Windows; the device they feel comfortable with is the iPad.
The possibility does exist. I think the Adobe CC hasn't been released under Linux for a similar reason, as Microsoft and Apple know that should Linux get the Adobe CC, people will flock to Linux.
A number of years back Adobe accidentally released a slide showing the Adobe CC running under Ubuntu, but strangely the product was never released on the platform.