When your progress depends on other 24 people doing hard mechanics on point and having all at least 4 hours of uninterrupted game time and your other option is just to buy gold and get your items you will obviously chose to buy the gold.
People only do raids because they are forced to do them because the drops, remove the drops and see how fast Raiding dies, it is litterally bad game design, if you want to have this content it should be so easy that any pug can beat it, oherwise GDKP will still exist.