To me, this is essential. Sourcing is such a complex thing, I would never leave it to an algorithm, not even the most sophisticated one. And things are getting worse with supply chains getting more fragile these days.
This may be the case in a big company. In far most companies (see: Where is Tryton’s largest potential of customers?), all of them are one person - or at least sitting in the same office and will discuss how to do best sourcing at a given moment.