Earlier quoted context omitted.
It's easy to say "there has to be something between the best customer service and things like letting shitting "AI" ban accounts" as an armchair hackernews user. But maybe, there isn't, currently. Maybe there simply isn't a solution at the scale of companies like Google.
'scale' is often used as a cop-out. If you double your customer count, and double your revenue, then you can double your customer support resources. O(n) does not become impractical just because the number gets really big. If they can't deal with something, the fundamental design is wrong, and would fail even if they downsized a thousandfold.
If you have 1 person doing support, they can deal with the weird cases themselves. If you have 2 people, they need to share information between themselves. If you have 10 people, they might need to set up some sort of escalation system. If you have 100 people, you'll probably set up some sort of routing system (multiple languages/specialization). If you have 500 people, you probably need some sort of internal abuse / anti-bribery effort to catch bad apples. If you have 1000 people you've now got a separate team working on setting up policies. If you have 5000 people you've got a training and evaluation system set up for your customer service staff. If you have 10000, you've got customer support staff in multiple countries around the globe and need to deal with conflicting and ever-changing laws in the countries you do business in.
All of this while marginal revenue per customer declines as your scale goes up. So yes, in addition to it being costlier per customer to provide the same level of support as your customer base grows, you have a smaller budget per customer to do it in.