Maybe it is because of my scientific training and having looked at the data from the perspective of a scientist.
Indeed, this is one of the answers to the fundamental question of epistemic rationality, i.e. “what do you think you know, and how do you think you know it?”. Oftentimes the answer to the latter clause is “because someone told me”, but that just pushes back the problem: whom can you trust to provide you with truth? Of course we have to get some (indeed, most!) of our information about the world from others, but it’s a thorny problem, to be sure… but as you imply, one way to sidestep it is “nullius in verba”—to personally gain the relevant expertise, and to apply it to the problem at hand.
But we cannot do this for every problem! There are only so many hours in the day (not to speak of more fundamental difficulties, like the possibility that we might find some given problem to be beyond our capacity for understanding, try as we might to unravel it). And it obviously does no good for you (or anyone else) to say “fear not, I have investigated the problem on your behalf, and here is the answer”, because in that case we’re right back to “whom to trust”…
All of this is to say that if you investigate some question (e.g., climate change), and find an answer to your own satisfaction, then you have solved the epistemic problem—for yourself only. Absolutely no one else is helped by this unless you can convince them that your judgment is reliably correct (or, of course, induce them to undertake the same journey of discovery as you did). This is surely frustrating (I know from personal experience), and indeed you may decide not to bother trying to convince others (and few would blame you for it)… but the fact remains that there’s no royal road to truth, and in particular “just take the word of someone who has figured it out” isn’t it.
A tangential comment—you say:
Indeed, this is one of the answers to the fundamental question of epistemic rationality, i.e. “what do you think you know, and how do you think you know it?”. Oftentimes the answer to the latter clause is “because someone told me”, but that just pushes back the problem: whom can you trust to provide you with truth? Of course we have to get some (indeed, most!) of our information about the world from others, but it’s a thorny problem, to be sure… but as you imply, one way to sidestep it is “nullius in verba”—to personally gain the relevant expertise, and to apply it to the problem at hand.
But we cannot do this for every problem! There are only so many hours in the day (not to speak of more fundamental difficulties, like the possibility that we might find some given problem to be beyond our capacity for understanding, try as we might to unravel it). And it obviously does no good for you (or anyone else) to say “fear not, I have investigated the problem on your behalf, and here is the answer”, because in that case we’re right back to “whom to trust”…
All of this is to say that if you investigate some question (e.g., climate change), and find an answer to your own satisfaction, then you have solved the epistemic problem—for yourself only. Absolutely no one else is helped by this unless you can convince them that your judgment is reliably correct (or, of course, induce them to undertake the same journey of discovery as you did). This is surely frustrating (I know from personal experience), and indeed you may decide not to bother trying to convince others (and few would blame you for it)… but the fact remains that there’s no royal road to truth, and in particular “just take the word of someone who has figured it out” isn’t it.