Forced to use Discovery Bank

It’s already been mentioned in this forum that Vitality has started forcing its members to get a Discovery Bank account just to be able to access the travel benefit already earned from Vitality. This doesn’t seem legal. Another drawback is you lose the travel insurance you could have gotten from your own bank by paying with your bank card - the complimentary travel insurance provided by Discovery is pitiful and they don’t allow you to increase the complimentary cover. Will now need to buy insurance from scratch, reducing the benefit from the discount which is already reduced by the booking fee. Remaining with Discovery is becoming less and less attractive