Because bowyers always make the top tip larger. Because it is uncomfortable to hold the grip upside down. Because up is always up and you have to start somewhere. Because if someone does it backwards and gets in wrestling match with the bow, it will be brought to me in pieces with the question " can you fix this?" this answer is, yes, and after many shots and two years that bow is still shooting, but it would have been easier to build it from scratch. Kids do ask fun questions, that is part of the fun in teaching them.