Prednisone is an immunosuppressent.
I see both sides of this here so please hear me out.....
I see it as 2 separate issues.
Issue 1) Weighing the risk of infection against the pain of your gout flare up is a no brainer. You were already on IV antibiotics so the risk/concern of infection is already there. That's why he was trying to get you comfortable with pain management rather than treat the gout. A gout flare up is a lot less dangerous than an infection that could very easily get dangerous quickly given what you just had done.
Imagine how you would feel be if you'd had a flare up, he treated it and suddenly you've got a serious infection causing you to stay longer? Possibly moved to a more serious floor for management? Because of his treatments you were even more sick? Pain is one thing and he tried to manage it. I'm not trying to belittle your condition but if a therapy he prescribed made you more sick there would be more people asking for his head on a stick at the entrance to the hospital instead of you and probably your wife/family.
Issue 2) Not knowing the ins and outs of the case its impossible to really assess the situation. Without knowing what your IV was set at, or your fluid input/output, any changes on the cardiac monitor, your blood pressure, oxygen saturations, blood work, etc. its impossible to know what was going on there. Maybe you were in the correct range for fluids in vs out and had the expected amount of retention given what you had just gone through. I would believe given the function of the kidneys that some fluid retention is expected. As much as you expected? I don't know I'm not a nephrologist or internist . The fact that he didn't follow up with you given the concerns raised is cause for concern and should be looked into.
As I said I see it as 2 separate issues. I'm not by any means taking the Dr's side on this. They can be wrong too. Considering the Urologist and the surgeon were already gone he may have been trying to manage your condition till they were available and express their opinion about your treatment. Or maybe the Dr was waiting for a Rheumatologist to consult with. Again I'm just tossing out thoughts here. No idea what the thought process was.
I'm sorry to hear you had to go through all that. I'm glad your doing much better and hopefully this is something you never have to experience again. Hope you keep getting better and I look forward to your pictures of the garden tour.