I think that’s where there is a difference between perhaps where fans see him, where the clubs see him, and where he and his team see him.
You can make that argument that he hasn’t contributed that much this year (although I would caution that it’s probably with the lens of what he has done in the past, and what his standards have been like, which in itself says a lot), but the bigger question is, in terms of value to the team, what is his value? His people will argue that his status as “the Scouser in the team” (poor Jones and Quansah), his leadership role (which was probably not given just on the basis of his being Scouse), and his age (not likely to be many more revaluations/extensions), make him a compelling candidate to take over as the top rung in the wage structure.
That’s also probably why it was always going to be hard to get all 3 done simultaneously because they’d be benchmarking each other.
As for Konaté and Díaz, I think your wording would reveal the most obvious answer: they simply haven’t been performing at his level as long as he has.
Konaté has injuries count against him, with only 108 appearances in his time with us, in contrast, Alexander-Arnold had 94 appearances in the former’s first two seasons alone, with a whopping 154 across the same time period. He’s great when he plays, although I’d argue that given all the expectations around Alexander-Arnold, especially given that he’s set those standards and expectations himself, he actually does have the larger contribution even just comparing the occasions when they actually do play.
Díaz has been great and is a favourite, but it’s also telling that he’s been praised for adding goal contributions to his game this season, because he simply hasn’t delivered those as much as we would have liked in the last few seasons. 8 goals and 5 assists in 37 league games across 2646 minutes last season, or 203 minutes per goal contribution. 4 goals 2 assists in 17 league games/997 minutes or 166 minutes per goal contribution in 2022-23. 4 goals 3 assists in 13 league games/963 minutes in his first (half season) with us, which was 138 minutes per goal contribution. In contrast, Mané’s entire career contribution for us was 133 minutes per goal contribution, a rate he delivered rather consistently on.
So it’s certainly justifiable that he gets a better deal than them. Will it be acceptable to all parties? I don’t know.