Why torpedo bombers usually carried one or two weapons

How many torpedoes could a large aircraft practically carry?

The exact proposal is uncertain, but torpedoes were so heavy and unwieldy that carrying and releasing more than one or two was exceptionally demanding.

The exact proposed load remains uncertain rather than accepting the viewer's large number. Torpedoes were heavy, long, and awkward weapons that demanded structural support and space. The aircraft also had to release them in a stable attitude and within a useful launch envelope. These constraints explain why dedicated torpedo bombers normally carried only one or two despite imaginative multi-weapon proposals.