How many mistakes are too many?

[Absurdity]

It also isn't that surprising that pugs can clear savage. The way fights are designed in this game you don't need that much communication, everyone has a few mechanics targeting them specifically and simply needs to execute those, you can't skip mechanics anymore so they always happen in the same order and most of them even target the same people. Combine that with the relatively little time you have to invest into raiding if everything goes well and you can easily clear the fight with a bunch of skilled randoms.

To add to that, actual hardcore FC will have some rediculous expectations of their members, I've heard of some checking your DPS every so ften and if you arent in their range, boop thats it for you buddy. Some people just don't have the desire to commit like that, but my PERSONAL experience is that you get leagues better playing with unpredictable randos, rather than doing content with nearly perfect players. It makes the content even more difficult, but you walk out of it much more capable, if you're trying to improve.

The people checking your dps are mostly parse groups and for those it's obvious that they'd do so since that is their party's goal, getting high dps parses/ speedkills.
Or world first statics but even there it makes sense since they go into the raid with only crafted gear and everyone needs to push their job to the limit.

Dps in your average savage party only becomes an issue if you constantly wipe to the boss' enrage even when nobody in the party dies to mechanics.