Personally I think buying a warranty is like prepaying for a major repair that may or may not happen.

Manufacturers offer these warranty packages at these price points as their accountants have figured out failure run rates. This is how they calculate the price of the offerings as well as how long they will offer it for. If was not deemed to be highly profitable then it wouldn’t be offered.

They calculate the majority will not leverage the warranty during that time period making it a cash cow for them.

That said, you are still covered under the regular power train warranty for 5 years so it all depends on your comfort with risk.