Wonderful perspective on time, & thanks for the compliment.
Yeah, I think that humans have a very abstract understanding of time, things affect us in our short lifespan because oftentimes we've never experienced them - death, sickness, adversity, emotional, mental, & physical struggles, possibly simultaneously, biological strangeties, but we deal with them, some people better than others, but the fact of the matter is that we are capable, & I don't think time or experience would strip us of our resilience, I don't think time would remove our ability to have hope in a better future.
Sometimes when people answer this question they result to pessimism, the idea that we would only become pessimistic/isolationist/indifferent as time goes on because we feel we've experienced everything, we (incorrectly) feel that we know what we will feel if we put ourselves in certain situations again, and sometimes we speak as though because everything else ends, we would become depressed because even after things that we enjoy have ended we remain, but I think these perspectives are wrong because I think these experiences we have can be different for us every time, and there are an infinite amount of experiences that will only be revealed with time, and as we change, how circumstances affect us will change too, so no experience is ever the same, humans, similar to what you said, cannot conceive time & thus time wouldn't be the sole determinate of whether we can live a good life, in fact, I think we would have more options in an infinite life in addition to all the ones we currently have.
I think an extended life could give us such an amazing perspective, we'd be exposed to so many different perspectives & we'd be able to gain a different & more comprehensive view of society & everything.
I think the concept can be explored to great depths, sorry if I explored it to far on one post.