That's a valid point, looks like we are not in the same role. I work mostly on internal software in a big "enterprise". My customers are mostly internal custome

That's a valid point, looks like we are not in the same role. I work mostly on internal software in a big "enterprise". My customers are mostly internal customers (marketing, sales, ...) but I have a luxury of having a business analyst, project manager or product owner that receive calls from them, so I don't need to explain anything directly to customers. In rare cases that some C-level break through and complain directly to me, it's usually easy to explain that if he wants a solution or an estimate fast, he should be dealing with datacenter team, since I don't have any leverage upon them, and he can complain directly to the IT-Infrastructure Director, to whom I don't even have direct contact.