Of Hawkwind/Motorhead fame, died from an aggressive cancer, age 70. He'd also been dealing with other health issues including heart disease (as did David Bowie) and diabetes.
I say this not as any kind of personal judgement on Lemmy or David Bowie, but this brings up the issue of the consequences of living the rock n roll lifestyle for decades. Long term drug and alcohol use WILL affect your vital organs, as does being a heavy smoker, the most insidious drug, for 40 plus years (and this is the main culprit, IMO). Bowie smoked almost until the end, and Lemmy as well I believe.
More than anything, it just pisses me off and makes me sad.