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But the snubber load will probably work OK though. You could fit it in the isolator, lamp or humidistat, since all have access to SL and N.
One reason we use a snubber (RC network) is that for a given ability to dispose of leakage current, it dissipates less heat when the SL is energised. The capacitor stands most of the 230V, passing a current 230/Xc where Xc is its capacitive reactance. The resistor limits peak currents at sudden changes in voltage e.g. to stop it welding switch contacts. As per the OP, it is possible to use pure resistance instead, but to achieve the same leakage-sinking ability there will be more heat in your back box when live.
One reason we use a snubber (RC network) is that for a given ability to dispose of leakage current, it dissipates less heat when the SL is energised. The capacitor stands most of the 230V, passing a current 230/Xc where Xc is its capacitive reactance. The resistor limits peak currents at sudden changes in voltage e.g. to stop it welding switch contacts. As per the OP, it is possible to use pure resistance instead, but to achieve the same leakage-sinking ability there will be more heat in your back box when live.