Elegran It is a question of 'caveat emptor'. If you fail to read a contract document properly before signing and sign up to something you do not want because you failed to notice it was in the contract, then that is your problem not the contractors and you cannot expect him to change things after the event .
I think holidaay company's include travel insurance in the price, yes because it is a nice little earner for them, but also because when they rely on holiday buyers to confirm they have insurance some say they have insurance, even when they haven't and then the company gets involved in lots of hassle when something happens and the holiday maker turns out not to have insurance and also lacks the money to pay all the medical and other expenses looking after them incurs.