B2B is usually far more complex and less likely to reach statistical plausibility.
Depending on what kind of volume you can pull in, it’s unlikely for automation to actually work well.
In theory, what they’re saying is true. Google is not magic.
It uses statistical probability to identify which sets of variables do or do not result in a target KPI.
Statistics require time and data, so what they’re saying is true.
But that doesn’t mean it necessarily applies to your specific situation.
B2B typically requires a disproportionate amount of education relative to B2C.
This means Google usually only captures demand for your product/service that’s already been created by other initiatives—or just makes sure you show up as another touch point in the decision making process.
It’s not incredibly effective at converting on the first touch point for B2B as is it is with B2C.
It will really depend on the product and purchase process complexity.