You do have to consider time. When Deshawn Watson was benched he was considered a top 5 QB in the NFL. When he came back after 2 years, he was never able to find his way again. Now, that's only one example. John Riggins famously retired, came back, and became a Super Bowl hero. Still, that one and a half years of inactivity and recovery is the reason why no team will trade a conditional 7th and take on that contract for a wide receiver who was once considered a top pass catcher in the NFL.
I'm going back to the bar closing analogy. Aiyuk is the prettiest girl at the bar, but she might be crazy and in the dark light you can't tell exactly how pretty she really is. So, before you chat her up you need to decide what you really want. I think none of us are ready to introduce Aiyuk to mother and make marriage plans. Many of us are willing to give her a go for at least one night.
Put in football terms, Vet minimum plus incentives. In reality, a one-year prove it deal.