Becaue many, if not most, other people have problems with bad receiver performance. Maybe Baofeng's quality control is such that most radios are bad but some are good. Maybe you have a magical good unit. Maybe Baofeng receivers are only susceptible to interference from certain frequencies that aren't used in your area or aren't strong enough to cause interference. Maybe your radio is just as bad as other peoples' but you don't have experience level or knowledge to be able to tell the difference. Have you used other hand held radios in the same area over several years?