It's probably the finance person's job to try to sell things. Besides, in some cases they might really believe that you should buy something for your own sake.
Both of these, spot-on.
A lot of this is dealership-dependent, and even with that dealership, the shopping experience can also be influenced by just how hard-line you are as the customer, paired with how eager the sales staff is to please.
If you are knowledgeable and/or simply have told them up-front that this is NOT going to be where you will be spending your time - that you will literally walk out on the deal right then and there - they
should know better and not bother you at this juncture.
We've been with our dealership since 2005: we're on our 9th Subaru lease with them - and counting my in-laws, you can add another 4 more (about to be 5, since my FIL doesn't seem to like his latest Legacy for some reason). We're in-and-out for the paperwork signing and delivery features-orientation in less than 45 minutes (they came close to the 30-mark, with my wife's '19 WRX) and the time before, for my wife's '16 WRX, the salesman actually came to our house with the paperowrk and delivered the vehicle.
They know that I like to run numbers (I bring my spreadsheets with me), and they know that while I will negotiate, I don't mind letting them make a few bucks, either - everyone walks away happy. They also know that because my wife doesn't like the car-shopping experience, they need to keep things speedy. In this way, they guaranty that we come back, year after year. Everyone wins.