Android's official documented listed Pixels as the Android Open Source Project reference devices until the release of Android 16. It also promised 5-7 years of support from launch.

Pixels are sold in 33 countries across North America, Europe, Asia and Oceania. A substantial portion of the Pixel userbase is using other operating systems. 400k to 600k active GrapheneOS users on Pixels is a significant amount based on how many Pixels are sold. It's only one of the alternate operating systems people are using. It's not only a few users as you're claiming.