Technically that is true because of the principle of Parliamentary sovereignty that is at the core of the British constitution - nothing can bind Parliament to any course of action. However failure to give effect to the will of the people as expressed in this referendum would lead to the largest Constitutional crisis in - well, honestly, in British history I think. I can't see anything comparable - and that would mean the Queen would be entitled to step in to resolve the issue - she does still have reserve powers if the government goes against Constitutional convention. That will not happen.
And also that they have no idea how they’re going to do it?
Sort of. Leaving the EU is actually quite simple - Britain could do it by a simple Act of Parliament. But that would be very messy because there are so many different treaties that would be affected and laws that would be effected. The sensible approach and the one I expect them to take will be to form a series of Parliamentary committees to draft a series of Bills amending the necessary laws and to negotiate with the EU for a smooth transition. Could a government screw that up? Yes. Do I expect them to? Not really.
Thanks for the explanation.