It's no different only if you're missing the big picture.
Car pool lanes are not a manisfestation of segregationary thinking that anyone that I know of opposes.
Bike lanes are a manifestation of segregationary thinking that I, for one, do oppose.
Do you support or oppose segregation of car pools? I support it, hence I do not oppose car pool lanes.
Do you support or oppose segregation of cyclists? I oppose it, hence I do oppose bike lanes.