I don’t care how long anybody has lived in a house,
it’s irresponsible to tell someone that they shouldn’t get an inspection ‘because they already know everything about the house’

Get a 30yr mortgage and obligate yourself to hundreds of thousands of dollars in payments, but don’t spend $400 because you live there ?
Is OP a licensed contractor, electrician, plumber, roofer etc. Qualified to know what’s
wrong with the house ?

I wouldn’t assume that the landlord is being fair.
Accepting things the way they are for the sake of convenience could turn out to be a VERY costly mistake.