According to that 17% of boomers+ are dependent on their parents. Just looking at boomers, that is around 70 on average. How many people that age even have parents still alive, let alone financially depend on them?
Not only that, if you're a single boomer with a living parent and neither of you have much other incomes its probably better to cohabitate in that old family house that was paid off in the 90s and share what little benefits you both receive.