Why battlecruisers should not become makeshift carriers

Would a G3 conversion with a midships hangar be useful for carrier-hunting reconnaissance?

He prefers enough dedicated carriers: battlecruisers should remain battlecruisers, while carriers supply the recon and strike reach.

The proposal replaces part of a G3 battlecruiser's fighting layout with catapults and a midships hangar to provide reconnaissance for a carrier-hunting group. Additions aft can undermine the usefulness of the third turret, while needing such a conversion usually reveals a shortage of carriers. Purpose-built carriers should perform reconnaissance and long-range strike while battlecruisers retain their surface-combat role. A carrier is described as a mobile information and strike bubble whose aircraft can reach far beyond the movement of the ships themselves. Complementary specialist ships offer more than weakening a capital ship to reproduce only a fraction of a carrier's capability.