Yes you can assume I have no idea how much money they spend behind closed doors. But I am not the one making an argument that the club should have done more.
The rest of what you say is just talk.
No club has ever successfully brought a case against the NRL for results on a field. Not Geoff Toovey's "there's got to be an investigation", nor other notorious referee calls (e.g. Roosters-Raiders Grand Final, Turbo's match-winning forward pass etc.). There's no precedent. No club has even attempted to bring a case based on a ref's decision, let alone win one - not even attempted to do it.
I also personally think it shows a bad culture if you are to kick and scream over results. It sends another kind of message when you blame others for your bad situation and kick stones and make legal threats instead of just getting on with your season. Certainly no player should ever have that mindset.
Your analogy with the on-site crew isn't relevant. NRL players still get paid. The conditions under which they perform did not change. Nobody at the Tigers was left out of pocket or unfairly treated by workplace law. Half those players aren't even with the club any more.
My acceptable formula is to spend all the money you have on development and culture internally, and spend none of it pissing away on pointless legal action. Because bet your bottom dollar, should the Tigers have brought a frivolous case, losing and potentially even facing a penalty (e.g. paying NRL's legal fees), they would have been slammed by fans and the media for wasting time and money, for being losers, and now you have head office off-side in any future dealings where you try to get the NRL to do you a favour.
Lee H may indeed be arrogant and lack football smarts, but he's a very successful lawyer, and surely, if anything, a club with a lawyer as Chairperson should be heeding that lawyer's advice.