My MiL has lived with her partner for over 30 years in his house, often being the sole earner. If they split up or he dies, she is either left homeless or is maintaining a house she doesn't own and cant really afford. Her partners son can't afford the upkeep either.
So having a share of the property would give her more financial security.
But, lots of women dont want to remarry, in part, to protect their children financially. They don't want the risk of losing their home to pay for a second divorce. I know women in this position, too.
I think it would be better to have a campaign clearly setting out the law as it is.