Q- Why would home insurance not cover my recent repairs?

​Probably a maintenance issue and not a sudden and accidental loss.
Our past UNCOVERED losses:
80 year old chimney came crashing down. Lacked mortar between brick, lacked maintenance.
40 year old boiler stopped. No water was getting into it and it seized up, lack of maintenance.
Leak behind a shower wall for 6 months. You never saw water on floor or basement? Lack of maintenance.
Insurance is NOT for the upkeep of your home. It is for sudden and accidental loss. A 60 mph wind blows shingles off your roof. A tree falls and damages your garage. A 2nd floor bathroom pipe bursts and there is damage to the 1st floor walls, ceilings and flooring……that is what homeowners insurance is for.