I expect that I will damage my bike when riding it. I also expect that anyone I pay to do work on my bike will take a lot more care of it than has been displayed here and if not I would expect them to fix it. It may be inconvenient or expensive for them, but that not my problem.I guess your take on this situation depends on whether your expect the bike to get dents in its life or not.
If your brand new bike had that damage on the downtube when you went to collect it for the first time would you expect a discount?