So you are suggesting because CDG, AMS and FRA exist - tring to compete on routes shouldn't happen?
no reason a VS/BD tie up can't compete also
There are compelling reasons. I remind you British Midland made these particular routes very successful up to the coming of the locos when they became unprofitable and were dropped due to mounting losses. If you go back onto core European capital routes, I suspect losses will be at the same level if not greater as VS / BMI have no presence in these markets and are going in cold against BA, KLM and er Lufthansa. You would have to offset those massive and continuing losses, particularly in the current market against the added losses of integration and delayed cost benefits of merger synergies. You would need a load of cash, something SQ IMHO be unwilling to throw their way.