I went to a SF Giants game the other day with StubHub tickets ready to scan. I entered the bridge side of the park ready to go through metal detectors. I walked

I went to a SF Giants game the other day with StubHub tickets ready to scan. I entered the bridge side of the park ready to go through metal detectors. I walked through and there were no detectors but cameras at the gate. I was confused and just kept walking and then someone scanned my tickets. I literally felt like I could have walked in with contraband and nobody would stop me. Were those cameras that looked at me on the way in doing some sort of scanning to see if I looked like I was nervous or suspicious? Genuinely curious because that seemed really dangerous.