You have to understand, when considering eyewitness testimony (being really generous with the bible here), when people give exceedingly detailed descriptions of events, that's a red flag. You see, people generally forget most small details about events very quickly, so when they seem to recall those details, in reality, they are mostly making them up. There are also details in the bible about Jesus that completely don't make sense from the perspective of an eyewitness account, such as how much Judas was paid to betray him. Who the heck besides Judas and the person paying him would have bothered to count it? When your Messiah is being crucified, that doesn't seem like a priority. And yet, the bible has that detail. In regards to considering "historical" accounts, excessive detail is viewed as a detriment.