I think it is clear that Heisenberg, Sommerfeld, Born and others at the forefront of theoretical physics at the time were well aware of how important and far-reaching the issues that comprised Heisenberg's real work were.
As explained in the article, his diversion into hydrodynamics was purely to secure a doctorate from a physics establishment which had not yet caught up to this fact, and I would say that, if anything, it is this establishment which suffered a surfeit of narrow specializations.
So you think your being a physicist gives you special insight into whether Sommerfeld, Born and Heisenberg understood the significance of what they were working on? Explain.
That's not an explanation, that's a rather trite attempt at an ad-hominem evasion. What (and how) does your exhaustive knowledge of physics allow you to conclude about how Sommerfeld, Born and Heisenberg viewed the significance of what they were working on, that you assume is not available to me? Use whatever physics is necessary to explain how you came to your position - I might know more than you assume.
As explained in the article, his diversion into hydrodynamics was purely to secure a doctorate from a physics establishment which had not yet caught up to this fact, and I would say that, if anything, it is this establishment which suffered a surfeit of narrow specializations.