How long does it take to 'read and do'? 10s? 20s? How much would you wish you could have those 20s again, if you were the Captain who ballsed up the evacuation?
Seen the procedure spectacularly ruined in the sim, when there is no 'real' pressure on, all because of too much haste and people thinking they 'knew' the drills.
I am well aware of how likely I am to c*ck up (very), and also how much I really, really don't want to c*ck up an evac!