And miss out on all the fun of shimmying around on the ground?
Seriously, the point of changing the oil is to get as much of the old goop out as possible. IMHO sucking it out the top will leave a layer of icky sediment on the bottom of the pan, if there is one because not all of it is in suspension. That's just my theory as no, I haven't ever dropped the pan to see for sure. But I'm going to keep on with that anyway as it's also a good opportunity I use to look at the general state of affairs elsewhere on the undercarriage.