It's not about a "good job" or a "bad job". It's a continuous game of cat and mouse. They're getting better at it just as some of the best funded bad actors are.
They only have 500 reviewers for the whole App Store, and in fact, they were chastised by the judge in the Epic case for investing very little in the review process six years ago when they also only had 500 reviewers for the whole App Store. This isn't cat and mouse it's theater while they're shielded by section 230 immunity and pocketing enormous profits.
It matters in the context of trusting their review process, and certainly "seems small" considering these 500 people oversee 2 million apps while scams and fraud have been prolific for years.
I think if they didn't have immunity for all the scams and fraud - and that's being challenged by both the EU regulators and in US courts - they'd probably have a lot more than 500 people. Multiples of it.
Just weeks ago they published a sanctioned Russian bank's app masquerading as a pomedoro timer lmao.