Yeah, this is a classic 'nice to have' solution - it's a pain point in the process and so you hear feedback and requests for solutions.
But the real question to determine if it's a viable product/business is does it drive enough value that people will actually buy it, use it, and remain paying customers?
I'd say in your example above, it likely won't massively decrease costs (the salespeople are still having to interact with a CRM) or drive increased incremental revenue in any real way.
That's the same as saying the CRM doesn't drive value, in which case we might ask why companies spend tens of millions of dollars customizing their CRMs? If you're the VP Of Sales, presumably you need some way to manage the sales pipeline, which is why you got Salesforce in the first place. But if your salespeople won't use it, then that's the same as not having it.
But the real question to determine if it's a viable product/business is does it drive enough value that people will actually buy it, use it, and remain paying customers?
I'd say in your example above, it likely won't massively decrease costs (the salespeople are still having to interact with a CRM) or drive increased incremental revenue in any real way.