Fair point, but I'd argue that "Google informed [you] of a perfectly viable alternative that might be cheaper" isn't what happened. What happened is "Google offered you Honda first, for no other reason than Honda paid them money to do so".

If you squint they may look like the same thing, but their subtle difference is important. One is a tool suggesting "Hey I see you're trying to do A, but I think B might also fit your needs", and the other is "You want A? Ok, I'll eventually point you towards A, but only after you consume this message from our sponsor."

Google's not genuinely thinking "Hey this will help the user more!" and building that into their tool - it's an ad platform that mimics being helpful, in the name of growing profits.

(That's fine for them to do btw; They're a company and they need to make money somehow.)