Why battleships resisted civilian conversion

Was a battleship ever converted to a civilian purpose?

Practical commercial conversion is ruled out because of the armour and cost, while preserving a battleship as a museum required much less alteration.

Heavy armour made a practical commercial conversion of a battleship too expensive in this assessment. Museum preservation was a different kind of reuse. A museum retained the ship as a warship exhibit and mainly changed access for visitors. That distinction separates opening a battleship to the public from rebuilding it to perform another civilian job.