That’s because you’re looking at it from your perspective where you’re capable of maintaining and doing small repairs on your properties.
But women, like in OPs case, have a much harder time keeping up with an old house. First it’s because most don’t even know how to, and second they loose their strength a lot quicker than men do. So even a simple chore as going up the attic to change the furnace filter can be outright dangerous.
Ask yourself this, if your wife was left alone for a year, would she be able to maintain and fix little things around the house without outside help? Or if your wife is capable and knowledgeable, just think of someone else you constantly need to help.
There are many elderly people in this kind of situation. Renting is a good option in those cases.