Probably because neither the market nor the real supply chain was ready. Ford sells more F-150s per year than Tesla sells across all models. When the F-150 Lightning takes off and ramps up production you can expect the consequences to be felt across the entire Ford lineup and for things to start moving quickly. (As others have noted, Toyota bought into hydrogen and its hybrids so it is not going to be an EV leader any time soon, but other majors are moving fast and will soon leave Tesla behind.)