"don't need to worry anymore" you made the logical fallacy again. The very idea of a good afterlife is precisely that there is no more worry for eternity. That's true of nothingness, yes, BUT it CAN also be logically true if you imagine an eternal life where EVERYTHING negative is impossible, including distressing thoughts like worry. Imagine an afterlife where everyone is permanently high as a kite without any consequences healthwise and where the novelty of euphoria never wears off.
Purpose is such a useless concept. Someone currently high on heroin doesn't care about their seemingly purposeless existence. They're simply too euphoric to care.
I always find that so curious about the idea of heaven. I think the appeal for many people is that we would get to see deceased loved ones, even pets again. But, in either case- if only our 'good' attributes make it in to heaven, are we truly 'us' anymore?
Take for example my family. My Mum died when I was 3. My Dad remarried when I was 10. My step Mum is a hugely jealous person- understandably given her past and a former husband that cheated. If they all get to heaven, will they be happy to share my Dad there? I doubt it! Plus, I'd want nothing to do with my step family in a heaven type scenario. Some of them made my life here hell!
I just find it interesting. For it to truly be heaven, wouldn't it need to be so far removed from what we recognise to be ourselves and others, would it even be that appealing? Maybe in an abstract kind of way. Like trying out a new game. Experiencing life with no limits. Still, what we maybe cherish as us would likely have to change for it to work. Unless I suppose we all get split into multiple realities. Maybe my Dad will exist in duplicate in heaven so he can be with two different families.
But, it kind of sounds more like reincarnation as a fairly bland but thoroughly good little citizen. I suppose it's hard to really envisage a life where we aren't really us. The 'bad' bits have been erased. The ones we love aren't really them because their 'faults' are also gone. Maybe everyone loves one another equally but then, what would make anything special or stand out then? If it was rainbows everyday, would we still appreciate them? I guess we would because our 'brains' would have been changed to always be happy.
It was quite a feat one day when I realised I also felt cynicism towards heaven! Propbably a good thing though because, I doubt I would get there- even if there is one.
I tend to agree with the OP though, I'm hoping there's just nothingness.