I can see where you're coming from but in the big picture tanking would have been bad. If the Dallas Cowboys have taught me anything it's that a talented player will get lost in the dysfunction of the organization and get wasted. The best examples of this organization not getting the most of out of players is Taco Charlton and Zeke. Taco was a bust for us and then played better, not great, but more productive on another team. Zeke Elliott is the best example of a waste of draft capital and talent. He was picked 4th, so a previous "tanked" season gave us the 4th pick. We draft Zeke and the Titans draft Henry. Henry rushed for 2000 yards I believe this past season and Zeke 900 or so. Zeke was great his first year but since then he's been a headache with off the field problems, suspensions, bad behavior, etc. Now he's an on the field problem with being fat and slow and a fumble machine.
I'm not bashing Zeke, I'm bashing the dysfunctional organization. Zeke was a blue chip stud his rookie year. Then the organization that pretty much demands mediocrity from it's players and coaches took an elite back and made him mediocre. There's a few players that can rise above the organization's demand and enablement of mediocrity. Players like Dak, martin, Romo, Dez. But those players love football. Players like Zeke love partying and being a celebrity.
So in summary don't fret too much about missing out on draft capital because we would have turned that great, blue chip stud into an average player. The organization will have to commit to winning again and until that happens then most talented players will be overpaid, underachieving JAGS.