The bad decisions we all make in life often take years to manifest into bad results. A family member choosing to smoke three packs a day can do so for decades before developing lung problems if ever at all. The sibling that chooses to live way beyond their means, constantly in debt, can live decades with little signs of poverty. You get my point. The thing is this...
I'm now old enough to see the long term negative effects of where these bad decisions lead. I see them both in myself and, more precisely, in my close family members. For us frugal types, when we see such behavior, it is easy to believe it will never turn into our problem. It is none of our business. Truth be told though, few of us can turn away from the needs of a sick parent. Or, perhaps, to deny shelter to a destitute sibling when they are basically homeless.
Close family members have destroyed their health by drinking and/or smoking. These addictions are expensive so there is extreme poverty along with the health issues. During the decades of bad behavior and substance abuse any hint or mention that the family member should change their ways was often met with a snarling rebuke.
To my point - in hindsight, I wish I would have been far more vocal about the bad decisions/behavior I witnessed. There were many verbal brawls but I should have pushed it much farther than I did. Eventually I just gave up. Now, I am saddled with the care and expense these bad decisions manifested into.
Unless there is no doubt we can turn our backs on close family members in their desperate time of need, than I believe we have the right and responsibility to call them out on their bad decisions/behavior.