I've always had Plus iPhones since the 6, then I switched back to XS, then again to 11 Pro Max this year.
It's heavy? Yes, but it makes easier to hold and feel more premium. While I enjoyed the portability of the XS, I've never adjusted to its small display when browsing the web, watching photos, and so on...
The iPhone is my primarily personal computer, I do everything from taking photos, to organising family/personal docs, family accounting, banking, web browsing, gaming, movies (on device or casted to AirPlay 2 TV), music, directions, communication, shopping, booking holidays... so I always want the biggest screen/battery. Dang I even wrote my updated resume on my phone...
On a side note... Plus/Max phones are not easy to use one handed for sure, but the situation has improved drastically since I started to use a ring holder. This is something I suggest to anyone that is struggling with one handed usage.