Not sure I understand this take.
$BRAND's role is to sell devices. IFixit's role is to make repairs more accessible to the average Joe. Obviously for more tech-literate device owners this might not be needed, but everyone else it is.
The incentives for this dynamic are pretty confusing (understandably). $BRAND and IFixit need to work together for repairability to work, but companies don't really have a strong business incentive to do this outside of regulation.
Obviously nothing about this dynamic is perfect, but the claim that IFixit harms the push for more repairable devices just isn't correct.