I don't agree with this statement as I have had 3 speedboats (16, 17, and 19 foot) which never had this problem. I think the Mac issue is due to the length of the boat and also perhaps because it is not supported all the way to the stern. Do people who have replaced the stock trailer with longer trailers (preferably with rollers too) have this "bump" problem?It's not by any means unique to the Mac. I've been doing it for over thrity years, on two previous boats (both power); in fact, I've never towed a boat that didn't require it.
Btw, one (less violent) trick to get the boat mostly into the stop is to incrementally winch the boat as you are pulling it up the ramp. Ie, pull it up about a foot, stop, winch the boat some more, pull it up another foot, stop and winch again, etc. If you do this 3 or 4 times, you will notice that you are only about 1 inch from the stop instead of 3-4 inches. I still do the bump after this, but it is a much more subtle bump to only have to move the boat 1 inch instead of 4.

