I think the only reason Google and their friends are doing this is to remain in control (how, when, if). They don't want to end up like the car industry.
I hope regulators don't fall for this trap.
They give great pricing to iFixIt and there you go, the margin they may lose on the phones through this is off-set to an extent via the common parts they’re now supplying.
They also know if they don’t provide the parts, which is to say they need to produce the top 5-10 components in a single fashion instead of an assembly line, someone else will so they seem to be getting ahead of the game.
They are actually modeling the car industry because folks are insanely specific about wanting OEM parts to the extent you have to specify in many contracts you can use OEM or equal quality 3rd party parts.
There are even some warranties (which cost more) that specify they will only use OEM parts so Google probably also sees they can charge a premium for “OEM” similar to the auto industry.
(I work in Auto)
Of course we need to be skeptical of programs that are just designed to look like they promote repair while being useless. But we also should give credit where credits is due.