What you're outlining here makes sense to me, too, and I don't run my amps with a lot of distortion, just "edge of breakup". But regardless of brand and model over the years, I've always recorded my amps with the master turned pretty far up. They do more of what I'm looking for sonically.So, that would explain why you prefer to use pedals. And it's nice to know the amp works well this way! I think though, that his point is that the true purpose/best tones of the amp, is with the master up, and that wouldn't necessarily require boost or OD pedals to get the fullness of tone (not that you couldn't still use them).
Several others have said that it really comes into its best tone with the master at 2 o'clock or better, so 7-ish on the 1-10 scale. That would make sense with this design of amp.
Again, I'm not disputing anything you're saying, and agree that it's great it works that way as well. If I get one, I'm prepared that I'll want to jack the master up more and run it through the power station... which also provides a usable loop solution for mod/time based effects.
Overdriven preamp tubes reach a point where they compress too much for my taste, and some of them can sound fizzy; in that case, I'd use a pedal if I wanted very low volume.
The power station idea is a great solution for the reasons you state.