GCP doesn't need to figure out how to sell to enterprises.
They need to offer a better product with more features, support etc. Because adoption within the enterprise isn't driven by the CEO or CTO. It's driven by individual architects and developers.
YMMV widely. It's not at all uncommon to have large software and infrastructure deals signed by CTOs and Business Analyst type people based on advertised product features and compliance certifications, without ever speaking to architects, engineers and implementors about technology fit, compatibility, etc.
Most non software firms consider technology as a cost center. Most don’t care about the technical merits of the platform; all they care is cost and support.
This is why IBM cloud is seeing adoption despite not being as full featured as aws or gcp.