You can't let professional crooks carry off a voter's silverware simply because the voter, being asleep, is unable instantly to demonstrate beyond a reasonable doubt that his silver has been stolen.

You can't permit burglars to drag sacks of loot through the streets of the city at 4 A.M.
simply because they are presumed to be innocent until proven guilty.

And if "arrest on suspicion" were not permitted, demanded by the public, and required by the police ordinances, away would go the crooks and off would go the silverware, the town would be full of "leather snatchers" and "strong-arm men," respectable citizens would be afraid to go out o' nights, and liberty would degenerate into license.

That is the point.

We Americans, or at least some of the newer ones of us, have an idea that "liberty" means the right to steal apples from our neighbor's orchard without interference.