how about a realistic comparaison, not a fictional one ful of stereotype.
Very good, elite player, does drive the raid forward. You might found their criticism hurtful, but more often than not, they have wealth of experience with raid and encounter that can benefit the whole group.
A low dps, not gem, not enchanted, dying in every patch of fire possible is not driving the raid, no matter how silent he his, he may very well be the reason why the pug will wipe on boss #2 for the next 3 hours.