gloss paint? GLOSS?!??!?!....why?!

The climbing walls at T-wall in Tokyo are nuts. they have painted the holds different colours with Gloss paint...i want more friction not less! I want them to cut out bits of real rock and firmly attach them to the wall...or better yet make all the real rock, roofed, warm and to where i am for very little money...

gloss paint....honestly.