To open links in a new tab, simply tap the link with two fingers (make sure secondary click is enabled in System Preferences -> Trackpad) and select "Open link in new tab". Voila.
This requires the use of 3 motions (secondary click on link, mouse scroll to appropriate "open new tab" option, then single click).
It is a very common and useful practice in multi-tab browsing to simply hit ONE click on a link, and it open in a new tab (i.e. the "middle click", or clicking on the Mighty Mouse trackball). This is more simple and intuitive.
For a trackpad, a three-finger click could also accomplish this. Has no one thought of this? Is this impossible to implement?
And yet you seem willing to use your Shift key, and to drag your middle finger all the way up from the "D" key to the "3" key on occasion.
I'm confused as to what you're talking about?