How about: bad ideas get to remain in power for much longer, because the generations of administrators/voters/executives that enforce them don't turn over.
Death ensures adaptation. For example, climate change denying oil barons have done much damage to the world, but we can take some comfort in the knowledge that they will soon die (or at least retire) and that their successors will probably be a little more enlightened. It may be too late by then, but at least it will happen.
>Run out of resources (live people discover/extract/renew better than dead or nonexistant)
One resource we are running out of is housing in economically productive areas, and it's not for lack of ingenuity, but by choice. The choice of the established, whose grip on power you propose to extend. Similarly, there is plenty of food to go around, just not enough value to trade for it in some parts of the world. What we're missing is not farming methods, but economic systems and power structures to implement then.
>You're literally asking for others to die out of your fear
The currently powerful, propertied generation is in a position to hold onto that power and property forever, via compound interest and seniority. If the current crop of 60-year-olds gets to be 600, the age of majority for voting will be 540 by the time they get there. And we will never outspend them on anything; even 20 years is a significant head start on saving and investing.
If they continue in their policies of environmental destruction and the monopolization of critical resources, like the underdevelopment of city land on aesthetic grounds, then we might not just be asking them to die, but going to war to claim those resources (and the helms of government, business, etc) for the young, to manage in different ways.
Not to get too bogged down in the specifics of particular issues, but age-related death does ensure a peaceful transition of power towards people more concerned with the present era's challenges and realities, rather than trying to, i.e., save the jobs of the last century or the sexual morality of the one before it.
Maybe age doesn't come to them soon enough to prevent the damage, but it does mitigate it.