Why the fuck does the Win10 SDK require 2.7 gigs free BEFORE asking you what to exclude from the install?

Simple, it installs all of it, then uninstalls all of it (to make sure you didn't install it before) Then it installs all of it again and then it uninstalls the stuff you wanted to have, then it realizes its mistake, uninstalls everything and installs what you need about 6 times, just yo make sure you have it