I don't understand your point.
https://openwrt.org/supported_devices/432_warning
While there is no warranty of ongoing support for any device under OpenWrt, those with insufficient resources are at great risk for “end of support”.
As quoted from the website, OpenWrt comes with no warranty. Here is why someone may want a device that is specifically built to run OpenWrt:
https://openwrt.org/reasons_to_use_openwrt#
Here is a second example, a Cudy marketed device that has attractive specs
https://forum.openwrt.org/t/cudy-wr1300-support/67593
and
advertises OpenWrt compatibility. They specifically disclaim warranty support if you load OpenWrt.
http://www.cudytech.com/openwrt_software_download