Ever heard anyone say when it's your time to go, it's your time. A friend I've known most of my life tossed this excuse at me as a reason to keep smoking. This statement implies God is a puppeteer that dictates every outcome of our life, however it's not true, we have choices. And choices have consequences.
This yogurt pictured has an expiration date, but if you leave it out in the hot sun, it's going to expire quicker! Believing God set your death date like you're a cup of Yogurt expires means your choices don't matter! Does God know when you're going to die? Sure He does. That doesn't mean He caused it, or gave you an expiration date, and a specific way of dying. If you jump off a 20 story building on to concrete, you're dead, and it was your choice. Did someone make you jump off the building? You made it your time, by choice! Same theory applies in these scenarios as well: Did someone make you smoke, drink alcohol to excess, get obese? Sure, some smokers live quite a while, however many don't, and that smoker that lived 70 years might have lived to 100 as a non-smoker.
Could the Yogurt accidentally fall out of the refrigerator and bust open? Sure it could, but that doesn't mean you leave it setting out to spoil because it's going to expire anyway!
This isn't rocket science. Take care of yourself. Put on your big boy/girl pants and put down the cigarettes, booze and drugs, start exercising and stop enabling yourself with the lame excuse that when it's your time to go, it's your time to go, so I might as well sit around smoke, drink, be lazy and get fat, because when it's my time to go, it's my time to go.