Why do doctors still make us wait so long? Cant they notify us about appt delay like in the commercial?

It's not the doc... Good flow of patients, under 15 minutes wait time, ease of making & confirming appts, calling if back-up, courteousness, helpful staff, is largely a thing of the past; and not under the doctors control anymore...Except when a doc is lucky enough to stay in non-beurocratic private practice, still enjoys what doing, and gives a hoot. I dream of re-creating the 21st century trusted physician. Help?