My wife and I bought new IPhones this past week. We finally gave up on our IPhone 6 & 7s. We enabled the Face ID option, after some thought. Although I’m not exactly on board with how secure Face ID is, I do believe it’s more secure than that pass code as someone can shoulder surf either one of us…. I often see people key in their pass code without even trying.
This is just an example of some of the trade offs we make in securing our sensitive devices. There’s no “one perfect” way of securing anything. You need to assess the risks and inconveniences your security controls you set in place.