I think part of the reason for this perception (or "conspiracy theory"...whatever- call it what you want) is that the IRB waited so long after the initial decision (essentially til after Thomson's initial ban ended) before deciding to take action.
In the meantime Gosper has been discussing the matter with Brian Moore, Stephen Jones et al.
It's simply a bad look for Gosper and the IRB.
If they (IRB were really as concerned about the perception of the game and the sport as a whole, then they should/would have acted swiftly, rather than entering into discussion with British hacks before making the call.
Now that Gosper and the IRB have set the precedent that they will now step in and possibly overrule the decision of the judiciary, People on twitter have now rightfully asked Gosper if he will now go back and review the McCaw attacks this year and the lenient penalties handed out to Greyling & Higginbotham.
To which Gosper has replied that those games don't fall under IRB jurisdiction !!?
In the press release about the judicary review, the IRB stated:
"As custodians of Rugby worldwide, the IRB has a duty to protect its image, values and integrity together with the welfare of players at all levels in order that the sport can continue its unprecedented growth and welcome more men, women and children to the Rugby family"
Now- if the IRB have no jurisdiction over the whole Quad nations (I hate the name "Rugby Championship"), that makes that statement completely impotent.
So, I'm drawing my own conclusions here, but that say to me that the only jurisdction they have is over international rugby that involve NH teams.
All that says to me is, "We're the IRB, and we'll look after the best interests of NH rugby"
To my mind, this whole saga has left the IRB looking seriously inept and utterly weak.