He wasn't registered to vote. He didn't donate money to campaigns. He had no social media platforms to promote his political beliefs. His friends and family claim he had no interest in politics. If the old media is remarkably uninterested in Paddocks political beliefs, it's because it doesn't appear he had any.
Increasingly, it appears that Paddock's only interest was video poker.
If the old media outlets were honest brokers of information, your argument would carry more weight. However, they routinely pretend that leftist murderers are really conservatives. Their failure to do so with Paddock is therefore worth noting.