Not really; anyone using chips with Intel ME or AMD PSP have an additional large binary blob running on their system which may or may not contain bugs or backdoors (of course, also realizing a sufficiently bad bug is indistinguishable from a backdoor).
There are tens to hundreds of such blobs running on almost any modern system and these are just one example. I would argue that ME and PSP are not the worst blob on many systems; they have both unsupported but almost certainly effective (MEcleaner / ME code removal), supported and almost certainly effective (HAP bit), or supported and likely effective (ME / PSP disable command) mechanisms to disable their functionality, and they are comparatively well-documented versus the firmware that runs on every other peripheral (networking, GPU, etc.) and comparatively hardened versus EFI.