Factory Reset and then download a driver package is not something that people are accustomed to. Even worse if, say, the touchscreen or internet don't work with the drivers included in vanilla Windows.
For the regular people, the ISO recovery can be done once by, say, a tech savvy family member or friend, and then they could do the regular factory reset within Windows afterwards, assuming they don't fuckup the recovery partition. With the driver package, you may need that tech savvy family member or friend everytime you perform a factory reset.
It is certainly nice, and I would like to have that option. However people might not be aware of that. They don't even know the website of Eve, and if the T1 is any indication of the V, the download/support page doesn't even exist on the website once they found it. Making the recovery partition function properly would prevent a lot of user complaints.