The Tesla Roadster came out first, by a couple years, but only sold about 2500 over its lifetime. By the time Tesla got its second model out, a couple years after Leaf went on sale, Leaf had 50k sales.
It took until 2020 for Tesla cumulative sales to catch up with Leaf cumulative sales.
If that were to happen, we will not be caring at all about Tesla's choices, so I'm not sure how you can make such a statement and then claim there is no argument to be had.