If you try to step back from the pro/anti-Dak war, there is a system issue here. I would guess that most of Dak's interceptions are on timing routes about 10-20 yards downfield. Dak was not a high INT QB early in his career and it was a strong part of his game.
I personally blame play design/calling for a large part of the INT issue. Soooo many analysts have pointed out that Dallas runs multiple routes into the same area. It came up again against the Texans where the color guy was almost laughing at a Cowboys play because two receivers went to the same area. Regardless, these route set ups are bringing in extra defenders and creating tight windows. You are just asking for a ball to get tipped.
Based on what Dak and Kellen have said, Kellen's opinion is to "be aggressive". Its pretty clear he is telling Dak to make the throw even if the window is small.
Again, IMO this is not a Dak issue. Its not a receiver or an O-line issue either. Its an OC issue.