I would also believe that they could have done all of the Hubble servicing missions with a capsule-style vehicle. If they had involved loading it into the paylo

I would also believe that they could have done all of the Hubble servicing missions with a capsule-style vehicle. If they had involved loading it into the payload bay and bringing it back to Earth to service on the ground, sure. But they were all done onsite, and you can do spacewalks from a capsule, too. I admittedly don't know any of the details, but I'm guessing that there's not really anything about the Hubble servicing missions that's fundamentally more difficult to do without a space truck than assembling Mir and Tiangong were.