Why battleships could not sensibly bombard Tirpitz

Were Allied battleships ever intended to bombard Tirpitz while she lay in a Norwegian fjord?

No; the terrain and firing geometry made the attack impractical and exposed the attacking battleship to unacceptable danger.

The answer rejects a battleship attack into Tirpitz's anchorage as tactically unsound. High surrounding ground and long, awkward gun trajectories would make observation and fire control exceptionally difficult. An attacking capital ship would have to enter constricted waters while trying to shoot over terrain. That combination offered little prospect of useful fire and a serious chance of losing another battleship.