Pro tip: Tell me you're new to a dungeon /rant

[NyarukoW]

... What if the Tank is new, and they say nothing? Is it on them?

Expecting new people to speak up is unreasonable and unrealistic. Try a new tank in sastasha on a PS3/4 without a keyboard. They may not even know how to chat in the text chat box.

In short, I agree with the sentiment that people need to speak up if they're new.

I advise all the newer players in the FC to announce that they are new on the DF, but you can't assume that all new player will do that. And people you meet on the DF, you need to assume that they can be possibly anything even be AFK bots or trolls and handle them accordingly, what you can not assume is that you will have a smooth speed run without everyone in agreement in the affirmative form.

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So, the healer admits to deliberately sabotaging the run to prove a point ...

The healer is not sabotaging the run, the big pull needs big DPS or the whole party is going to wipe. The tank is the necessary sacrifice, because if the tank is still up, then they will speed into the next room/boss/pull and wipe everyone there when the healer has no MP. Been there done that enough times to know it is better to give the tank firm shake and wake them up to be more sensible.

...By the time you've reached level 50, even if you've gotten there without a keyboard by then you've most likely created a few macros to help communicate with other players - including admitting you're new and asking for explanations if you need them....

More nonsensical assumptions. Many players doing FCOB don't know how to use macros, and so they just require people to be on mumble and TS and just simply call out stuff. New fresh 50s, good luck if they know that they can make macros. You'll probably have to explain to them how to put together a macro.

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BTW the speed run itself is not the problem. The problem is the speed runner. The assumptions that the speed runner makes is just plain wrong and the evidence is plain obvious from all the wipes it has caused and continue to cause. In addition the speed runners will verbally abuse the new players and force 1st-timers to skip cutscenes and that is just not the best way to do things. There is no shame in going slower or at least taking, heck 10 minutes (massive exaggeration, more like 60 secs) to communicate if you must.