Why?

As already replied by other HNer, most of the projects are existing ones.

Our customers are the enterprise, not startups.

The consultants are expected to bring value within the customer's IT stack.

Usually even the dev environments are provided by IT, to be returned on project termination.

If the customer hires us to assess their stack and provide feedback on what to change, that is another matter.

Which still needs to be approved by their IT anyway.