Indeed, while our politicians bloviate about 'terrorism' and how safe they're keeping us, this is the reality. Notable that this occurred in Texas, where the legislature would be as likely consult Jesus about the incident as a security expert. I honestly have to wonder whether our society will be going down in flames soon due to the odd combination of reliance upon and willful, resentful ignorance of knowledge that is being promoted in public culture.
Just sit in on a discussion of the business case of a new technology. "This is where the future is, we need to be where consumers/customers are, everything must be digital." So they spend $3m on a new "social" or "cloud" platform, then say "oh yeah, we don't have the budget for security monitoring or personnel to cover this platform. Roll it out anyway."