Well I've never used one so I'm assuming its a bit like touch on an iPad...
You could think that if you haven’t used the trackpad, but it’s different than iPad precision.
The iPad (and iPhone) are 1:1 movement ratio when using touch. One inch of touch equals one inch on screen. The Mac trackpad can provide more or less movement to the on screen cursor than the touch input on the trackpad.
Like a mouse, the slower you move your finger on the trackpad, the slower and more precise the control, and conversely the movement is larger the faster you move. With a trackpad and mouse, you can go from one corner of the screen to another if you swipe quickly, or gently control points and pixels with small movements.
When working with a 27” display, you don’t need a 27” trackpad to cover the entire screen — just like you don’t need a 27” mouse pad. The iPad’s touch input is the same size of the screen, so slower movements aren’t more precice. They‘re just slower.
Personally, on the Mac, I find my finger on the trackpad is more precise than my wrist dragging a puck around.