Sewer scope inspection revealed a cracked pipe underground

[Marc Shin]

I'm under contract on a property and the sewer scope inspection report said "The service was observed for approximately 82 feet, and the termination was not visible or and condition was not determined. This appeared to be near or at the municipal connection in the street. There appeared to be a cracked and collapsed pipe around 35 feet. Offsets, root/soil intrusion and some build-up in the pipe. Recommend consulting with a qualified plumber to maintain the service lateral and repair as necessary."   The seller is telling me "you're finding the usual and customary in a house this age."  and they are pushing back on not repairing the cracked pipe.  Should I push back on them and be adamant that they need to fix this or is this not really an issue?