Totally agree. Typography is similar to grids in the same way. As a design it's tempting to set up "a perfect grid" so your life will be easier and everything

Totally agree. Typography is similar to grids in the same way. As a design it's tempting to set up "a perfect grid" so your life will be easier and everything will look great. But it's often better to know how and why grids work, and then create more informal layouts intuitively.