Wow, I didn't know they were supposed to have Exocets. Another case of fitted for but not carried in RN ships.
Do you know where they were supposed to be fitted?
More likely they came to their senses and realised what a dumb idea it was.
Like fitting Seadart, right?
Seriously, fitting a few anti-ship missiles when the ship has been designed to take them is not a bad idea. I mean, it would have been a
better idea to do what was done later: No Seadart, extend the flightdeck and increase the amount of munitions carried, but the British were working under different assumptions when the Invincibles were designed.