Admitting to Incompetence

I sent out detailed, step-by-step instructions for one of our procedures at work yesterday. It was directed at the sales team, so it included the manager & 3 reps. Today, a day later, I get a reply from the manager. Apparently, she didn't have time (was too lazy) to read the email and wants to have a meeting about the procedure. So instead of spending 5 minutes reading it over, she wants a 30 minute meeting involving 5 people? 5 minutes vs. 2 hours & 30 min? I went to the manager's office to tell her that we probably don't need a meeting if everyone just reads the email. But she insisted that we have a short meeting because she wants to make sure everyone gets it. So basically, she knows that her staff is incompetent and probably didn't read over the procedure. Going by this principle, the sales staff should just never get emails. We should just verbally tell them everything. My company really needs to do a better job screening people before hiring!