Like another comment mentioned: that's a problem for YouTube to solve.

They pay a lot of money to many smart people who can implement sophisticated bot detection systems, without impacting most legitimate human users. But when their business model depends on extracting value from their users' data, tracking their behavior and profiling them across their services so that they can better serve them ads, it goes against their bottom line for anyone to access their service via any other interface than their official ones.

This is what these changes are primarily about. Preventing abuse is just a side benefit they can use as an excuse.