This is a workaround for alternative WMs.
What I always do is map a key (F4 for example) for the command "xmodmap -e "pointer = 3 2 1" " Mapping the key is different for every window manager but most of them support it. And in this case f4 (the menu button) will make left-handed mouse meaning that taps on screen will be rightclicks and you can map key f5 with xmodmap -e "pointer = default" to make it left-click again.
I know its a bit stupid but just works and you dont need to rightclick a lot usually.
Hope someone finds it useful.