It's not really about how much JBJ, Betts, or Kelly are worth what they get paid. IMO, they're all more than worth it. It's just the way the system works.
I have no issue with Betts thinking he deserves more, but at the same time, I also have no issue with the team's $7.5 figure. It's a very fair offer for a 2nd year arb player, and a considerable raise over the $950,000 that he made last year.