They do respect your time. You can play and progress for free. Time isn't wasted unless you get no entertainment value out of the game. The market exists for people to pay to skip because some people don't want the grind inherent to an ARPG. It is why the D3 RMAH existed. It is why the D2 black market economy existed. It is why the Boba Fett D1 trainer existed. People have always been willing to be pay for convience.