This is so not true, unless you take a 90 minute shower. We stay off property, so we have to factor in a 15 minute drive. If we get up at 7:45am, we're in the parks by 9:30am, without rushing. This includes: having breakfast, packing lunch, driving, parking, tram, bag check. If we rush, we can be in by 9:00am (though we rarely do).
It's also not true you won't get a lot done...though I guess that depends on your definition of "a lot". We get plenty done. We always have our 3 FP+ booked, and will do rides that traditionally have smaller lines anyway. Unless it's a rare exception of a day, it's not like 6 rides all malfunction at once, for extended periods. The FP+ lines normally don't have long waits at any time of day. Sure, standby lines get longer than they do in the first hour, but then they drop at the end of the day. We can easily get 7 rides in before lunch (I'm guessing, we don't keep a specific tally).
Just don't want OP to get the impression that you "won't" get a lot done simply because she doesn't rope drop. That's completely and absolutely false.