http://wayland.freedesktop.org/libinput/doc/latest/tapping.html says:
"
Tapping is disabled by default, see this commit because:
- if you don't know that tapping is a thing (or enabled by default), you get spurious button events that make the desktop feel buggy.
- if you do know what tapping is and you want it, you usually know where to enable it, or at least you can search for it.
"
http:// wayland. freedesktop. org/libinput/ doc/latest/ tapping. html says:
"
Tapping is disabled by default, see this commit because:
- if you don't know that tapping is a thing (or enabled by default), you get spurious button events that make the desktop feel buggy.
- if you do know what tapping is and you want it, you usually know where to enable it, or at least you can search for it.
"
So the default won't be changed I'm afraid.