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Also, with Macbooks and everything being soldered or glued, after the 1 year, if your keyboard goes on that 16", that's a huge cost since the entire top deck get's replaced. .
It is actually pretty reasonable. That would be a top case replacement, the same thing they do for a battery replacement runs from $129 to $199, depending upon size and age of the MBP. For that they replace the Al case where you hands rest, keyboard, trackpad, and battery. Labor is included with the price.
Product Service and Repair Information - Official Apple Support
Select your product to find information about warranty, repair options and pricing.
support.apple.com