Yeah, the OG Steam Deck video before it even released made very clear that the original run was made with self-tapping screws, which meant that disassembly and re-assembly was always going to result in a less firm and tight re-assembly because the holes have already been tapped once.
It was honestly my personal biggest complaint considering it seemed otherwise like they were aiming to support self-repair. Very refreshing to see they changed tack to a costlier option for the sake of their customers. Very true, companies rarely do this out of the goodness of their hearts, and Valve is an unusual company.