Perhaps consider these points.
ADS-B OUT allows ATC to have the situational awareness of your position relative to other aircraft (terrain, restricted airspace) and be able to provide you with a separation, alerting or flight information service.
If you have ADS-B IN then its more like self-service where you have the situational awareness of other aircraft who have ADS-OUT.
USA study looking at accident rates for GA planes & air taxis 2013-2017 found that the aircraft equipped with ADS-B IN were 48-53 % less likely to have an accident and 88-89 % less likely to have a fatal accident.