i suppose youre right in that these things ended up getting bunched together, however, a mitzvah is a mitzvah. im not going to give up the possibility of doing a mitzvah simply because it became associated with a certain hashkufu.
as for gedolim who wear techeiles, i hear your argument and completely understand why someone would be completely in the black if he chose to follow this path. i, however, am more convinced by the arguments presented from the text (as related by chacham) which suggest that maybe i can be zoiche to be yoytzey a special mitzveh that no one in family has fulfilled in hundreds and hundreds of years. wheres the harm in trying?