Why finishing Seydlitz would not solve German shortages

How useful would Seydlitz have been if Germany completed the ship that was already about 95 percent finished?

She could have been a useful partner to Tirpitz, but crew, fuel, and lack of operational intent would still limit her value.

A completed Seydlitz would have been more useful than an unfinished hull. She could have operated as a partner to Tirpitz and added another heavy cruiser to German options. Completion would not supply the missing crew or fuel, however, and there was little serious intent to employ her effectively. Industrial completion alone could not provide the personnel, logistics, and command decisions needed to turn the warship into usable combat power.