Yup. We're talking about mere millimeters more to reach with the thumb. Millimeters. It's not impossible to adjust. And, as you and others have mentioned, the benefits gained with a larger screen are easily worth it.
I've said this numerous times now: the things dedicated iPhone users cling onto are becoming either negligible, petty, or very specific. The fear of anything non-Apple also tends to cloud judgment.
I think both arguments are petty if you want to spin it in that way, because we are in essence just talking about our mobile phones. Android users can sometimes try to proclaim widgets and quick toggles as life saving dealbreakers when in reality they maybe save a second or so of time every now and then. iOS users are often less-informed (which annoys me) but cling to the qualitative side: "more responsive, faster, more polished, just works," whereas Android users can dip into numbers like screen sizes and specs. But I've used both pretty extensively lately and really I think they both do enough for everyone. One might be more useful or friendly, and that's the end of all these fruitless debates. It's really just personal preference, because there's certainly compromises to both, but both are completely sufficient as smartphones.