It's a response to arguments that the government has a legitimate need to strip search everyone, regardless of what the charges are against them.

The notion some guy pulled over for failure to pay a speeding ticket, or arrested for failure to pay child support, or arrested for having a dog off leash (really?) has paraphernalia shoved up his ass should seem terribly questionable. The argument the government has a need to strip search everyone, should give way to a realization that probably is not true.

As I point out, these are not my wild examples, but examples specifically mentioned by Justice Breyer in dissent.