Failure to make accurate predictions about the tech market is hardly evidence of grift. It's just really hard to do well. In areas that I'm most familiar with Gartner broadly comports with my own experience. It definitely favors entrenched players probably because they have so many case studies but honestly that heavily influences procurement teams too. There's always a strong thread of "let's buy what our competitors bought last year" and Gartner can reinforce that. As much as anything it's cover for a decision making process that's very difficult for a lot of orgs. That's valuable even if it's not very scientific.