One reason for me that isnt mentioned here, was estate taxes.
As we bought a house together, if my spouse passed away when I am not a citizen, there would be different rules applying to me. It may not matter if I just sell the house, but if I wanted to stay here I would have to deal with all that while coping with losing my husband.
And who knows especially if I have children.
Im not really finance oriented person but it just felt like too much extra to deal with in an already sad time.