That's a different and fair argument (and so would I as a Pixel 3 owner).
That's a different argument, but this one too works even if “the estimate were two orders of magnitude too small”. Even $10 a year is a bargain when the alternative is throwing the phone away.
For perspective, they could have asked each additional Pixel purchase $.50 from the starting price to support it for an additional 5 years. (also pixel 3 owner)