If the incidence of problems is some relatively small number, like 5% or 10%, it's very easily possible that you've never personally seen a problem, but overall

If the incidence of problems is some relatively small number, like 5% or 10%, it's very easily possible that you've never personally seen a problem, but overall we'd still consider that the total incidence of problems is unacceptable. Please stop presenting arguments of the form "I haven't seen problems so people who have problems must be extreme outliers". At best it's ignorant, at worst it's actively in bad faith.