Who is forcing them to offer universal WFH? Are you saying people pushing for WFH are going to be able to force WFH on every employee and every company?
No one is pushing for universal work from home, so there’s nothing to succeed at. I’ve never heard anyone say that they think no one should be allowed to work from an office.
If they are instead forced to offer universal wfh as a concession to the labour market, then yes, outsourcing might be more attractive.