Please define “spiritual benefit”.
Knowing our outward looking society (which insists on hats for walking in the street but allows copying music because no one (besides God) sees), keeping CY will probably get your children a better shidduch, while not keeping it may mean that your children are relegated to being home schooled (as if anyone would accept a Chalov Stam child). So yes, there is a “spiritual benefit” (as per above) in keeping CY.