What's the point when recruiters do this

Spoke with a recruiter for almost 40 mins for two difference software engineer roles. He spoke in a way that I was pretty convinced I would get an interview with the team. But then he ghosted me. Was it all to get my resume and info? Did he really need to do all that? I'm not sure why recruiters would spend this amount of time during their day to just ghost you when it could've been just a 5-10 min call