In this case, there are no Android options that would work for me and are currently available, aside from the Pixel. The Pixel is a great phone but the hardware issues can randomly appear. As one that prefer small phones, there aren't many choices. The options are essentially the Sony Xperia X Compact, Pixel, and Galaxy A3 2017.
I found a way to get the Galaxy A3 2017 and I have already had to maintain it after a month. Short answer to your question is fear of what could go wrong with a Pixel, and lack of Android options that would work for me.
Trust that I have tried everything possible and available to me. The Pixel is the best.