Whilst this is true, there is one difference I think. One incident happened during a race and Williams and the FIA already were talking about it as soon as it happened. Overall it would have made the car annoying to drive but not dangerous. On the other hand, the tyre situation happened BEFORE the race as far as I know, which to me would mean an exclusion from results similar to that of Ricciardo in Australia.
On the flip side though, if the FIA penalise teams for breaking the regulations then surely there should be some penalty for Pirelli for:
1) The numerous times they have gotten things wrong (Spa being the latest, though it is all a complex topic)
2) For not informing the team that the tyre pressures are low? How does Pirelli know that Merc didn't have a faulty sensor that was showing it a little higher than it actually was? Under the grounds of safety, as soon as Pirelli knew this they should have told Mercedes. And surely that would have been BEFORE the race. It wasn't like it was a flexi front wing that was pushing limits etc, or a fuel mass flowmeter that was only seen in the race. I think Pirelli should be warned about not telling teams information immediately too, at the very least