Why some mikrotiks, specially new models like hap AC2 have been made without beeper? In my opinion it's an error because it's the best way to inform users that something is wrong. Is it a room question or a cost question?

Thanks

Apparently any component that is not strictly required for the average user is at risk of being dropped.
User-LED, beeper, flash storage for at least 2 RouterOS versions, LCD screen, they have all bitten the dust since the days of devices like the 2011.