It IS a lack of effort/laziness/not enough talent or skill.
Crash Bandicoot N'sane Trilogy for example has a file size of 24 GB. Is anyone really going to argue that Super Mario Odyssey, The Legend of Zelda: Breath of the Wild or Xenoblade Chronicles 2 are smaller games then that? I can give you many examples by the way.
"The strong do what they can and the weak suffer what they must" - Thoukydides







