Yes, certain parts of our product are indeed just lightweight wrappers around an LLM. What you're paying for is the 99% of the other stuff that's (1) either extremely hard to do (and probably non-obvious) (2) an endless supply of "routine" work that still takes time (3) an SLA/support that's more than "random dev isn't on PTO"
Is that a bluff used to negotiate the price?
Why do they have an internal engineering org at all if they can't manage the most basic maintenance of a software product?
In fact having sold stuff If a lead says this, it is a huge red flag for me that I probably don't want to do business with them because they are probably a "vampire customer"