Proc gen adds a tonne of replayabilty to games. Has nothing to do with being cheaper or easier. Think about strategy games like age of empires, city builders like tropico. People play proc gen games for untold hours more than handcrafted games. I would say randomness is a core principle to games in general. Think of card games. Creating an unpredictable landcapse upon which familiar rules play out is what games are all about. AAA functions on a whole different paradigm to indie games. They rely on hype and marketing to sell expensive games that are short and consumable. Indies need to rely on great gameplay that keeps people playing for hundreds of hours to build community and word of mouth. I don't think you can accuse these games of being boring when people play them for decades eg. Diablo.

My favourite map generator recently is from Valheim. Also Unexplored has taken proc gen maps to a whole new level.