This line of reasoning has always felt incredibly bleak. There's an implied lack of preference for continued experience which can be repurposed to regard suicid

This line of reasoning has always felt incredibly bleak. There's an implied lack of preference for continued experience which can be repurposed to regard suicide indifferently. It's difficult to take a consistent position that holds both "I don't want to die early" and "I don't care if I die". It requires an arbitrary judgment on what constitutes 'enough' life. Imagine a pill that gives you 10 years of good health and freedom from aging. No tricks, no evil genies, no monkey paws. It's completely free and universally available. It's not a one time offer. You can change your mind later as many times as you want. How many people would actually refuse that pill and choose to die at a 'natural' time? Based on how much we spend on medicine, I'd guess very few, and that seems like a clear preference for being alive.