Sorry dude, it's irresponsible GM'ing to say cap isn't a concern with a player who wants 30M a year. Just because it's not THIS year doesn't mean you don't take the cap into consideration.
Look at what Adams is doing to our cap right now, soaking up 20M a year on a broken safety.
The Rams gave everyone a false sense of kicking the cap can down the road is a viable way to build your roster with a bunch of high priced free agents.
Yes, as I pointed out if a team values a player, they can fit him in. Jamal Adams is a $20M a year safety but won't count $20M+ against the cap until 2024--his 5th year on the team, when the Seahawks will be likely cutting him.
If the Seahawks valued Chris Jones they would go get him, give a fat signing bonus to keep his cap hits down for the first couple of years of the contract and go from there.
But past trades such as the Adams trade have burned them good. That is why they won't be pursuing him. NOT because they can't afford to fit him into the cap, the Seahawks don't want to give up the assets it would take to acquire him. They value those more than Chris Jones, simple.