I do not think that many organisations check the diplomas of the specialists. It is rather difficult to check diplomas and it takes a lot of time to wait the unswer from university to the request. That is why there are so much fake diplomas becouse people knows that nobody will check the diploma.
In addition, an employer can test a candidates knowledge on the spot. An experienced professional can easily test a candidate for suitability for work.
So you always need to do. A young specialist may have a diploma in his hands, but the wind will walk in his head. Why take such an employee to work?