Has role specialisation in B2B selling gone too far?

Largely inspired by the work of Frederick Winslow Taylor, and made real by Henry Ford and others, the age of mass production introduced the concept of role specialisation in the pursuit of manufacturing efficiency.
And for a considerable period of time his idea that there was “one best way” had the desired effect – as long as the customer was prepared to accept a standardised product, and often at considerable cost to the job satisfaction of the workers involved.
It also had no need to take account of the feelings of the inanimate objects being produced. A Ford Model-T is unaware of the number of workers that have been involved in its production, or of the hand-offs between them.
The idea of role specialisation appears to have obvious attraction when applied to the sales function, as exemplified by the number of organisations that separate the SDR, sales and account management