As you've noticed, the PC industry is extremely price-sensitive. The reason you see so many PCs running Windows Home edition is because it costs the PC makers less than the Pro edition, which in turn allows them to cut the price tag on a PC model by about $100.
For most consumers, Home edition is good enough. Businesses that run on Windows enterprise networks need Pro edition, however, because it's a requirement to join a PC to a Windows domain or Azure Active Directory account and then manage that PC with Group Policy and mobile device management software.
Pro edition does have a few added features you might be willing to pay for, especially if you're planning to use your PC for business.
- It supports full BitLocker encryption without requiring the user to sign in to a Microsoft account. It also allows the use of Windows Information Protection features for secure document sharing.
- You get to use the full Hyper-V virtualization platform to create and run virtual machines.
- You can configure Pro edition to be a remote desktop server, allowing you to connect to it remotely from another Windows PC (even one running Home edition) or from a Mac or a mobile device.
- Instead of installing updates on Microsoft's schedule, you can set up custom schedules for devices, deferring updates for up to 30 days while you wait for other people to experience any update-related bugs.
But that's pretty much it.
If you prefer a PC that comes with Windows 11 Pro (or Windows 10 Pro, for that matter), your best bet is to look online, where you can find stores that specialize in PCs built for business. You can also go to online dealers like Dell, who will happily configure a PC to your specifications. Adding the upgrade to Windows Pro typically costs $50-80.
Or you can buy one of those PCs with Home edition installed and upgrade it yourself.
If you have a license key for a Pro or Business edition of Windows 7, Windows 8.1, or Windows 10, you can use it to upgrade. (Instructions here: "How to upgrade from Windows 10 Home to Pro for free.")
You can also buy the Pro license online. The full retail price is $200 (ouch) at the Microsoft Store. You can find legitimate discounts of $50 or so from other online retailers, but be very suspicious of any discount that's more generous than that. If you see someone offering a "lifetime license" for Windows 11 Pro for $49, there's a good chance that the seller is not authorized to distribute that license, and there's a chance (small, but not zero) that Microsoft could revoke your license key in the future.