You are forgetting the dimension called "time" Mr. Angry But Dense.
Professors might hit those numbers because having informed opinions about their students is a large part of their job and they see large turnover by definition. Directors could have a chance, but even there I'd say hundreds is actually unusual, unless your standards for quality of opinion are low.
And then that's all people, not just H1-B holders.
Because large tech companies with a large cohort of H1B + tendency to frequently reorg + career level with impact with large reach means I have indeed worked with hundreds.
Sorry bro, you don't get to deny my actual experience.
even if you were the largest outliers on the planet you could not possibly collaborate with hundreds in a way where you get to know much about them. even if you said “tens of h1b’s” it would be a hard sell :)