It doesn't matter for the material he disclosed, which we can indeed evaluate on our own. But it does matter for the things Snowden is saying that aren't backed up by that material, such as his supposed ability to read Barack Obama's emails.
I'm still waiting for the NSA to send me back the information I requested off of my personal dovecot installation. Hopefully they'll get around to it soon as I accidentally deleted an email and don't want to have to go through the 'Reset Password' route. :(
He leaked something that hints to the government doing unconstitutional blanket surveillance of their citizens.
Let's investigate that and leave Snowden's life or level of understanding out of it.