Persuading a judge to keep info away from public record because it's confidential business information supposedly requires Google's attorneys to argue the docs

Persuading a judge to keep info away from public record because it's confidential business information supposedly requires Google's attorneys to argue the docs contain numbers, personal/privacy sensitive information, names of subcontractors/companies that they consider competitive advantage (I'm not a lawyer)?! Wouldn't it make more sense to redact those sections out rather than discussing them behind closed doors? I mean, I imagine it should be possible to assemble merits & antitrust-legality without disclosing the nitty gritty? Or is that exactly the point — that Google could easily comply, but is weaseling to protect its image, reputation? And if so, what motives would a judge have to play along? What leverage does Google have against judge (not prosecution)?