A salesperson could at least ask 'what is a better price we can shoot for?' or 'what features do you really need?' whereas a visitor to a pricing page just disappears.
Your platform may have 1000's of features, not all of which all your clients want or can pay for. Packaging into simple groups may not possible until you have the volumes to figure out what works
Many clients need specific features that you don't have yet, pricing calculation becomes very complex, and depends on customer to customer as well. We will charge more to some customers simply because we know they need a lot of hand holding and special assistance