You're pointing out how ridiculous it is, but let me expand:
So, as an order of magnitude, the price asked by Qualcomm for extended support is 1M$. That's 10c/device. The VoLTE license costs more than that. The H264 license costs more than that.
Also Pixel makes Android, so surely, Android can't become incompatible with older hardware because of Android, or if it does, it's Google's own doing!
There is the question of security of binary blobs for which Google doesn't have the source code, ok!
Well let's see: - Billions (ok, maybe just hundreds of millions) of Mediatek devices have their bootrom "open". Should we stop upgrading those, because of physical access issue? - Everyone considers 2G utterly broken, allowing downgrading attacks, thus Google gives Android 12 the possibility to disable 2G. Yet, Google "refuses" devices launched with Android 11 Treble HALs, like devices launched with Snapdragon 888, to have this "disable 2g" [1] - Pixel 6 stayed 45 days on an """obsolete""" security patch
So, maybe we should stop saying that security is the alpha and omega, and all or nothing. It is important. Reducing our e-waste is more important.
[1] This is a weird thing, related to Treble, Google Requirement Freeze, and Vendor System Requirements, I can explain in details if anyone is interested