Probably because this team isn't good enough without adding. We have 2 premium prospects in A-Ball and we can trade veteran players for more prospects to build a potentially great Baseball team that can compete for championship. Not one that will struggle to stay in the wild card race.
We haven't even been at .500 once this year. And Smoak with that cheap option is an attractive trade chip. And for all we know he could go back to being s*** next year. While another team might see him as a beast that can help them now. It's obviously something they are going to look at it. We know Estrada is getting traded. Lets just hope he's out of his funk so we get a good prospect.