From my point of view we would never bemoan any club struggling to raise a side and conceding the game, we've nearly been there a few times our self. Especially now Covid seems to have made it even worse for playing numbers, as you say Pomfresian people are doing other things and rugby doesn't seem to be a priority as much. Wibsey and probably many other teams in the league are likely struggling from week to week not knowing if they're going to have 7 or 17 available, I know we have been.
What I do take issue with is instead of conceding the game using the Covid card so to speak, although it's a tricky one and based on honesty, the incentives to use it far outweigh admitting you can't fulfil a fixture and potentially losing points so I see why teams may be doing it. In no way can anyone 100% say whether it is being used incorrectly as you just don't know, though both our cancelled games were cancelled on the Friday due to covid which just makes me think it's a little coincidental. Either way I just hope we can get through the season with as many games played as possible and see some good rugby in between!