Why does cognitive neuroscience have such a grip on psychology?

The status of medicine has never been as confusing. We all realise it is important to know how the body works, and that it works to its full potential for someone to lead a fulfilling life (whatever that consists in)? Similarly I should say cognitive neuroscience will guard the neural necessities of brain activity. So far so good.
But the pretences of cognitive science are far bigger. It supposes to be able to provide answers to all the questions philosophy of mind has been debating over the last two millennia.

Their grip on psychology is brought on us by gross failure on behalf of philosophical theory with regard to the mind-body problem. The time has come—now more than ever—to clarify what (nothing) and where the mind is (not in the brain), how it works (by mobilising—recognising and projecting—meaning in objects and events in the outside world) and how it contains the person’s self (by collecting other people’s visions on us).