My son went to both and both were by far the best of any showcase.
The fact that every coach watches EVERY player is incredible.
The rule you are discussing is true, but key word... RECRUITING Talk.
My son was a 2020 and spoke to several D1 coaches. This year they had some of the top HEAD Coaches and Recruiting coordinators speak at the event. I am talking top 25 schools, IVY league schools.
The venue being at the stadium adds something to it, but make no mistake, the focus of the coaches is the key.
Baseball Mom - I spoke to the organizer (who is incredible). They had 88 coaches (5 no-shows, pretty common). 71 on day one and 64 on day two, obviously some coaches don't attend both dates, but to be expected.