Simple inexperience. I'd bet most of those people are mid-level developers who have used ORMs enough to hit the rough edges but not enough, or with enough independent agency, to have worked through how to play to ORM's strengths while avoiding their weaknesses. People that were given a hammer and are just understanding that their hammer doesn't work very well to install bolts, and maybe don't have the authority to say maybe I should use a wrench or the flexibility to try this new crescent shaped idea and see if that works better.