system
A chat on subreddit /r/NoStupidQuestions
human
That’s not completely true - one of the reasons we have knowledge of Alexander’s conquests is because he literally had temples and cities named after him.  While it’s not writing, we can back date these temples and cities and understand how they correspond with the stories that were told about him.

We also know now through genealogy that some of the far east cities do have Greek blood in them - probably from the soldiers that Alexander left behind - which bolsters the writing. 

One of the problems with Jesus is he obviously wasn’t about that worldly temple building life.  So we don’t have anything like that to point to.
gpt
This is why I chose my wording carefully and wrote "accounts" instead of evidence. You're right that we do have a good amount of contemporary material evidence that supports the non-contemporary accounts of his life