Transferring Characters.

Yeah so I've been playing on my friend's account for over a year now, and I farmed mounts such as Raven Lord, Fiery Warhorse, White Hawkstrider, Blue Proto-drake, Blake Drake, and a few other rare mounts, plus I bought Sandstone Drake, Traveler's Tundra Mammoth, Grand Ice Mammoth, and many more mounts worth over 100k gold total. Now, I go and buy my own account, and I ask Blizzard if the mounts I got on that one character alone will be transferred with me when I transfer my character to a new account, and he said no, that mounts are now account bound since Mists of Pandaria, so now I have to spend endless weeks farming these mounts again and waste a lot of gold buying these mounts. Does anyone else think this is retarded? I'm actually pretty pissed at this, I think that even though you can use them on all characters, you should be able to take your mounts that you got on each character with you if you switch accounts, otherwise it's really pointless to buy character transfers nowadays.