Why the focus on hurt? I don't think either Gibbs or Robinson would set the franchise back. But I don't think either somehow puts the team on another level that they aren't currently at. Again, we took Elliott using the same logic. And in his time here, even when he played great, the team was no better than the 2014 team that was led by a 3rd round pick.
Because at the end of the day, regardless of who the TB was, there were other issues that caused us to lose. Whether it was issues along the OL. Or the DL got beat up. Or the secondary got picked apart. TBs have limited value and don't have as much of an effect on the direction of a franchise as other positions. Elliott proved this. Great player for a few years, team didn't suddenly jump into another level.
What about the Eagles? They built two really good runs games in their SB year in 2017 and last year and did so without investing in a first round TB. Instead they invested and built a great OL, backfilled the RB position with mostly FAs, trades and mid round picks. Philly isn't proof of what you are espousing here. It's more in line with what I am saying.