I agree that it's not a smart business practice, nor an efficient means to build a team, to be constantly active in the trade market. It's simply not nearly as statistically effective as drafting smartly.
That said, can you understand why some fans are frustrated at seeing a team decline, while their gm uses trades far less often than the vast majority of other teams in the league? I'm not saying it should be a frequent method, but if it's utilized at the other extreme end of the spectrum, it feels like not every reasonable facet is being tried to improve things.
This summer I was on both this board and the league trade boards, drumming up whatever discussion I could to trade for Fowler. I was willing to part with Tatar and any additional piece not named Larkin to get it done. Some reasonable compromises in dialogues with Ducks fans included Tatar/AA or Tatar/Sheahan. At the time, I was even willing to throw in a 2nd rounder, and was pondering a 1st rounder. At the moment, I'm a bit more hesitant about using that last resource, just because the likelihood of a very high pick is increasing, but the point is that I believe this franchise needs multiple quality defensemen, and I'm perfectly willing to give up significant resources to get them. Really, they should have tried to make a trade like that, plus drafting Cholo (or whomever), PLUS trying to go after one or more guys on top of that, whether via draft or free agency or trade. They should be stocking the pond with blue liners - maybe at a ratio of 2 or 3 for every forward they target - and, once they find a few that stick, they can return to a more balanced ratio. (Although, had they been a bit more balanced in the past, such an extreme swing might not be necessary.)
But the point is that it's been several years since they've been willing to break any eggs to make this omelette. However it happened, here they are, and it's time to make some tough decisions going forward.