Simple------there are no dedicated nor trained staff any more.
Years ago many large stores held staff training before they opened their doors and this practice was all about the different techniques of selling, treatment of the customer as an individual and generally making sure that you appeared attentive to attend to their needs and meet the demands of the customer.
Shop managers were visible and always on hand to sort out any problems or queries.
Dedication to the job was key and it was the job of the manager to circulate around the store in order to make sure that attention was paid to selling rather than a customer walk out empty-handed.
Courtesy and manners play a huge part in whether a customer returns or not.
It used to be a pleasure shopping in large stores years ago. I was an avid shopper in Lewis's, Liverpool where staff " stood to attention " in readiness to serve their customers. If you were a regular in the store the staff got to know you and you were given that extra bit of service so as a consequence you returned there.
This is not happening now as staff couldn't care less if you were there or not and quite honestly preferred that you weren't while they got on with their conversations as though you were invisible.
It wouldn't have happened years ago !
John Lewis is more the " old style " way of keeping their custom as they strive to give the best customer service and their staff training is an all important part of the thriving business that it is.
Forgetting where you left your keys does not mean you are “losing it”