It's insane technology illiteracy like this that's the reason that security is such a shitshow across the world and allows tech companies to just ignore the bare minimum effort. Tech CEOs should be criminally liable when gross negligence like this results in meaningful breaches to consumers.
Sloppily patching the giant hole in your stone wall doesn't make it hold water when there are 500 other cracks and smaller holes. If you didn't consider "don't have big holes" a feature that justified spending money on bricks at the start, you're never going to get an end result that does the job.