No, won't do it.
- There's not only desktops in this world but also plain window manager
- Why would one force -gtk2 on a KDE user?
- -gtk3 is what one should use on current desktops using gtk3 and thus
having gtk2 is there is just cruft and ballast and would make people
maybe being happy when they actually should use -gtk3 as that's what
their desktop uses