No, most people don't want to build their engines because building engines is a different thing than making a game. People want to build just the part that's un

No, most people don't want to build their engines because building engines is a different thing than making a game. People want to build just the part that's unique to their game. Very, very game devs care about how things are drawn to the screen or what's happening in their physics engine -- they just expect those things to be easy to use default features.