Some people collect and enjoy tools for their own sake, but a carpenter carries a hammer to pound in nails and build something, not just because it looks good on the belt. The more time they spend in overhead, getting the tools to work correctly, the less time they spend . . . With the complexity of the tools comes specialization. After a while, that person will obtain the secret passwords to the file server or router or whatever, and, if you're lucky, will keep them secret. You now have a sysadmin.
Specialization requires time and energy.
Not everyone has, or should spend, the time to read all the manuals and figure out the systems and solve the system problems. But someone should. Even in extremely small organizations, where a whole person can't be justified, part of one should be officially recognized and assigned this role and the resources to carry it out. To let this function go unstaffed is to waste a great deal of the power in the systems, to waste much of the large investment in technology that most businesses now make. And, often much bigger, to waste expensive labor, misdirected into fooling with the computers while not getting the right value out of them.