Look at that advice carefully. What they are being told is that they are wrong, they will lose, they have no case. Of course, yes, if they want to be thick ( and that is what that amounts to) they can drag it out but I and many other solicitors would refuse to act for them. They are wrong, they have no case. And I would advise them that unless they were very lucky on the day that they will get stuck for all the costs and so they should. They are wrong.
Anyone who gives you nicer advice is simply placating you.
mf