Perhaps you are already tired, I think you are reading without understanding, I think that is quite clear.
If someone could farm resources for 10 hours, someone else at that time focused on, for example, quests, or simply did not have time, now you turn off the option of farming for everyone (I'm talking about mobs up to 1 boss). The source of dishonesty is 10h, which the other player cannot make up for, this is not treating everyone equally as you tell yourself.
No worries, I'm not tired, and I clearly understand what you are trying to say.
You must get the point that both of the players from your example had a choice in what they do.
None of them was forced or prevented to do any action since opening KS HM till disabling the loot.
Both of them could farm the items in KS, one decided to do so, others decided to choose less profitable task.
None of them knew that the loot will be disabled as well.
This is quite similar example to players complaining about not receiving rewards, when not participating in an event due to deciding their time to be spent in other way.
You can cause "dishonesty" if these two players would be threatened differently at the same time, being forced by the game mechanic. Ex.: we disable player A to enter instance, when player B can still do that.
I would like to mention, that here always may be a change which may looks good for some players, and bad for other one, but it mostly happens to make the whole game better, or bring some balance. It's never an intention of the team to bring a disproportion, what obviously would cause players being unhappy.
Take a note that it was initially stated that the loot has been temporarily disabled.