I just think flying is fantastic and being strictly terrestrial does not compare for a second. And the way pterosaurs can both fly and quadrupedally crawl around like a mammal is so awesome.
Just imagine, the biggest pterosaur was higher than a giraf!
Why would anyone spend even a second dreaming up a flightless pterosaur? BORING!

THIS is what they want to take away from you.


Flightless pterosaurs are also fairly unlikely, see: https://youtu.be/gCdOVC7CcXk?t=4854