That's been my experience as well, in practice (I don't if there's a legal reason).
Yes they'll sometimes pick the most qualified applicant, but only if you submit your application the same day or same weekend, which is often the case with open houses. It really depends on the landlord however -- for a lot, it's literally the first qualified person to apply, which is why you want to be the first person to the open house and have all your documents ready to apply on the spot, since it might be gone 30 minutes later.
Yes they'll sometimes pick the most qualified applicant, but only if you submit your application the same day or same weekend, which is often the case with open houses. It really depends on the landlord however -- for a lot, it's literally the first qualified person to apply, which is why you want to be the first person to the open house and have all your documents ready to apply on the spot, since it might be gone 30 minutes later.