Ink limiting with Lch

[MonsterBabyBLN]

i have read all sorts of posts about THE ink limiting for each channel.

i would just like to get some things straight and understand the WHY behind it..

my RIP prints out a swatch with 7 inks from 0-100 percent..

lets take the cyan f.e...

i can visibly see the 100% patch is the darkest and to my eyes "most intense" patch.

when i read the chroma value though.. which i learned was supposed to be my ink limit.. i get the patch at 65% !!!.. which is way lighter...

i can understand that this patch is more "real cyan" and the darker one shifts towards blue.. but why dont i want the more intense one to be available?..

is it "mixable" with other inks?..

in RGB profiling i always read "more ink=more gamut" ?.. now i limit myself although the paper could hold more??

thanx for letting me understand this