Wow, really? That still mkes no sense to me (and judging from the replies, I'm soooo in the minority here!)
When coming in to a dock, we generally come in pretty slow, but we want the bow and stern/spring lines attached to the boat cleats with the other ends of those lines in our hands so we can control any leftover momentum when we reach the dock. We step off the boat get one wrap on the dock cleats till the boat has come to a full and complete stop, then tie everything off. This has worked pretty slick for 15 years. You can't do that if you don't have the lines attached to the boat coming in.
But all that really matters is that whatever system you use works for you. Wouldn't be the first time I've been accused of doing something backwards!
The way you do it is not uncommon when you have crew onboard to help, and with crew it is actually easier to control coming into the dock your way. However when trying to come in either single handed, or with only your girlfriend to help, it doesn't work as well.
When out with my girlfriend, I get the bow close enough that she can either jump off around the middle of the dock and with the boat still moving forward at about 1kt, or use the boat hook to pick up the bow line (she prefers to jump), but with the engine now in reverse, she is able to loop the bow line over the bowcleat before it gets tight halting any remaining forward motion of the boat while I am starting to back down from the bowline (it's adjusted so that the bow can't hit the dock in front if I come in a little faster and the engine doesn't stop the boat first), she then hands the stern line to me in the cockpit where I loop it on the stern cleat, and take the engine out of gear, we then do the spring lines and everything is done.
When single handing, or whenever I don't have someone onboard that knows how to assist in docking, I do a similar aproach to the dock, but leave the engine in nutrual and at the last moment before the fender near the bow bumps the dock I walk forward with the boat hook and pick up the line from the dock, and bring it back to cleat it on the stern cleat, stopping the remaining forward motion of the boat. I then put the engine in gear to keep the hull against the dock while I get the bow line secure.
Either way takes about 2-3 minutes to have the boat tied up with all the lines correctly positioned so the boat sits nice and even in the slip. If I had to retie the lines to the dock cleats everytime I came in, that would add a significant ammount of time, and make it much tougher to come in with one, or no crew to assist.