I hadn't heard that, but that's exactly why he says (in his latest video and here) to avoid too much speculation, because there are other things that could go w

I hadn't heard that, but that's exactly why he says (in his latest video and here) to avoid too much speculation, because there are other things that could go wrong under similar conditions. Takeoff and landing are the most risky parts of a flight so it's no surprise that if there is going to be an issue, it would be during takeoff.