In the end it doesn't matter for as long as the PSU passes CE / FCC limits.
As long it does, exactly..
Does anyone believe that ?
Trace the PCB layout for a bit and you'll notice that this PSU isn't your bog standard flyback PSU design. It would be nice to get a better picture of the component side to see what it what.
I'm not defending the PSU but would you care to elaborate why you say it is not a "bog standard flyback PSU design".
I looks like the big electrolytic is not across the output of the mains recitifier directly. Not doing this improves harmonics and power factor.
And there are a few other tell-tale signs that the designer of the PSU has thought about passing EMC testing. Look at the gate drive, snubbers and auxilary power filter components.
Ofcourse this is not a quality PSU due to cheap electrolytics placed close to heatsinks but I don't think it is a bad design at the core. Except for putting a USB-C connector at the other end without the ability to negotiate the output voltage.