some landlords will only rent to perfect tenants. The houses these landlords own are called "vacant"
Some other landlords face reality, and are more concerned about the prospective tenants future rental history than their past credit history... Since we can't accurately predict the future, we look at probability.
If someone has a long history of flaking out on landlords, creditors, spouses, relatives, friends, then the probability is that their future behavior will not bode well for the landlords.
If it were my rental you were looking at, I would have to look at the entire picture not just one issue.