There is no way in the world I'd agree to the patch job that the agent is suggesting. Heck, I would be totally shocked if those repairs are not about 5 times your estimate. New, good quality, wood floors for a kitchen could easily cost $3000-5000 installed. Kitchen cabinets could cost at least that. What if they discover damage under that floor? If this happened now it could easily have happened before.
Laminate flooring looks like laminate flooring. It's not equal to real wood flooring. I'd bet that there's damage under the cabinets. If the floor is warping I'd not be surprised if there's some damage to the subfloor.
I would NOT consider this house until it's repaired to the same condition it was in when the offer was made. I'd then want a discount in the price due to the possible consequences. I'm betting the dining room floors, kitchen cabinets, and countertops will need to be replaced.
Are you absolutely sure you wanna mess with my carrots?