It's a salary cap league. Why would you NOT care where the money goes or how it gets divvied up? That's a huge part of how a team is successful or not. Look at what Watkins has done, he's a great player, and I'm not even saying it's a bad thing they have that much tied up in him. It can be afforded because Mahomes is on his rookie deal. Next year, when Mahomes makes 20% instead of 2%, they'll have harder decisions.
I will say this, if they have 21 mil free, either they plan on going after someone like Ramsay or they structured Hill's contract inefficiently, since they'll struggle paying everyone moving forward, and minimizing cap space this year to maximize cap space moving forward would be optimal to maintain a competitive team.
Tldr; if you're asking who cares, I do. Why don't you?