No it doesn't: I could have very vivid memories of stuff that happened in Edinburgh 30 odd years ago - and I could still be mistaken.
But you just said you could give a fairly good account of the people and places you knew. So that it would be evident that you knew the place or had spoken to someone who did. That means you would also be able to recall witnessing someone, say, walking on a lake, fairly accurately.
Nope: that story could well be fiction and you can't exclude that, and then there is the unbelievable nature of the claim (of feeding 5000 people using the equivalent of a large packet of fish fingers and a loaf). The problem you have is that you believe this claim as a matter of religious faith and as such you are reluctant, or unable, to consider that it might not be true.
If you're suggesting that the whole story was fictional, how do you explain the corroboration between independent versions of it, since that gives the appearance of non-fiction?
If I told the same story often enough and stressed the points I wanted them to remember then I sure they could - and I've no doubt they would elaborate too. I take it you do understand that people can write incredibly detailed fiction?
Perhaps a story about a miracle could be taught accurately, but you've still got the problem that someone else told the same miracle story with details that explained something you didn't fully explain.
As Williams says, we can't prove that the miracles happened, but the pattern we find in the accounts is not what we would expect if the stories had been made up or mistold or were 5th or 6th hand accounts.