Why protected cruisers are difficult starter ships

Why are British protected cruisers poor choices for a newly established navy?

They are capable ships, but a new navy usually lacks the infrastructure, organization, and trained personnel needed to extract that capability.

British protected cruisers could demand more support than a newly established navy could provide. Getting their full value required suitable infrastructure, trained crews, and an effective organization. The ships themselves are not dismissed as bad designs. The comparison with Arleigh Burke-type destroyers makes the same point about the support burden of a capable warship.