Its about peer review.
The problem with letting NXP have time to fix any flaws is that ts does not encourage chip makers (or any security product vendors for that matter) to use well established, peer reviewed methods that ensure a highly secure system. The more we can shame them in public, hopefully, the more they will realise that there is always someone with a PhD waiting to hack them.
How many times have we seen this happen? Take the car door locking system that has been hacked for example, as long as vendors insist on using proprietary systems they will continue to come up against researchers breaking their poorly designed code.