It's not just about weight. It's about the square sides, which make the weight that much more annoying (painful) in the hand. It's also about thickness.
Apple has been going nuts with size, weight, and thickness since the iPhone 6 series, which was comfortable.
The current phones, particularly the max, are simply failures of design. They're horrible. Apple is all but acknowledging that in the 15 series with different, lighter material and rounded edges.
I was amused by all of the Apple sheep crowing about the return of square edges, which are objectively just uncomfortable.