I use both daily. TouchID on the SE, and FaceID on the iPad Pro. I also had an X, XS, XS Max, and XR in my quest to find the perfect iPhone to pair with my iPad.
TouchID, when set up properly, is more reliable. Plain and simple. If the iPhones got the same, more advanced FaceID from the iPad Pro, that gap would be closer. However, as it stands today, many see more issues with FaceID than they did with TouchID. Does that mean TouchID will make a thrilling comeback? Doubtful. But to pretend that FaceID doesn’t still need some work is pretty shortsighted.
Personally, I’d prefer the option to choose between them/use both. I’ll also say that TouchID v1 is far more finicky than v2, and I see a higher fail rate than I did on my 7 and 8 series iPhones. I do, however, mostly prefer TouchID on a phone, and FaceID on the iPad.
I’ll also highlight the irony that you mention things getting “heated” when you’re the one so inflamed by someone’s preference that you feel the need to make a pointed comment about their device, and imply that others can’t have an opinion of modern features because they prefer a phone you don’t approve of. That kind of attitude makes you look like an over-sensitive and over-compensating tool.