Sounds like it's working to me. Uncooperative credit slaves pay less money in interest.
If you can afford those things more safely, you should be considered less desirable? Instead, it's the people who are likely to be in debt until death that are better?
But I guess, yeah, fuck society, get rich while you can.
If you can afford to leave, then yes, you are less desirable than someone who needs to stick around. These services are priced based on the assumption of long-term engagement. If you cut that assumption short, the expected revenue is also cut short.
Finding new customers is expensive. When you leave, the provider needs to find a new customer to replace you. They are much better off keeping existing customers. The credit score gives an indication of how likely one is to remain a customer. Those who are most likely to stick around are the best kind of customer.
When you paid off your loan, you also stopped paying the associated interest. In other words, you retracted your patronage and stopped being a customer. This is not desirable for a business. The credit score was reduced to reflect that. 60 points is very little movement. It is not like they're writing you off as a compete undesirable with that, just statistically slightly less desirable than someone who continued to borrow.
Remember who pays for credit score information: Lenders, not you. They are the customer. It is there to benefit them, not you.
Realistically, paying off a loan rarely hurts credit scores. And realistically, someone with years of paying off credit cards on time is going to have a high credit score (at least high enough for things you describe), outstanding debts or not.
They help nobody but the bankers.
Personally, I'd like to have much more control over who can view my credit data and for what purposes.