There's a difference between:

    Foo Corp
      - Wrote Java on Bar project

And:

    Foo Corp
       - Designed and developed infrastructure for Baz for Bar project (Java)

A resume that doesn't give an idea of what someone did, beyond the tech they used to accomplish their goals, isn't likely to pass my interest test.

In my point of view, most hiring requires a form of internship. No one drops on to an established team with full knowledge and experience with the internal tools, procedures and products.

And yes, I lament that internships are so maligned. It shouldn't be that interns are poorly paid; we should be able to hire someone with decades of experience in a tangentially-related field at a competitive salary, and consider them to be interning on an unfamiliar field.

Internships are probably the best way to hire, but they only work for people at that specific stage of life.

University students already have a three-month gap in their schedule where they aren't doing anything, so they are willing to take a temporary role to fill that gap.

Experienced people who already have a job aren't going to drop that to take on a temporary role unless they have an unusually high risk-tolerance or unless they are desperate.

FWIW, I was introduced to this method by others, and have used/been a part of this method at several companies now; and I find that each company where I have seen it employed has had remarkably low turn-over and high team morale. Much lower turn over, and higher morale, than the companies I've been at that have done otherwise. Also anecdotally, the companies that employ this method have been the same companies that seemed most willing to train and aid an under-performing employee, rather than simply let them go.

I think it's because the awareness of the need to ensure performance is baked-in to the process; rather than having an assumption that the hire should have a high level of performance. Employees aren't like other physical assets, like computers and other hardware, they're malleable human beings that are accepting of improvement.

But I don't know of any large studies on the merits of this approach, so perhaps I've simply been lucky to have had positive experiences.