This is available in corporate versions (aka enterprise or LTSC). The home versions are significantly cheaper and dont offer that functionality out of the box.
2 reasons - a lot of endusers appreciate it surprisingly, and some of those bloat of preinstalled applications subsidizes the cost to make it cheaper to purchase.
There's not as much bloatware in Windows 11 as you might think - most of it is links to install applcations, not the applications themselves. Part of it is due to advertising - you're actually getting Windows license a bit cheaper in exchange for these "features".
But you can disable and remove it - manually. These scripts do it automatically for you as a convenience but the ability is there.
In enterprise versions of Windows, there's tighter control and less "features"/bloatware installed by default, and you can use GPOs and other settings to deal with it very easily. This of course comes at a cost that most endusers don't want to pay.
Feel free to purchase the non home versions of Windows and you will find there _is_ a choice.
2 reasons - a lot of endusers appreciate it surprisingly, and some of those bloat of preinstalled applications subsidizes the cost to make it cheaper to purchase.