Shower Faucet Silicon Replacement

My basement shower is a 4 piece shower system - rainfall showerhead, handheld showerhead, knob, and a faucet underneath. The faucet silicon has worn off between the faucet and plate and I need to replace it. My question is, do I need to silicon the plate onto the tile as well? This was not done by the contractor. As you can see, the shower knob also has a plate and the plate has not been siliconed onto the tile. If the plate isn't siliconed to the tile, wouldn't water just pass behind the plate? or is this something I shouldn't worry about?

here's a link of the shower system. I've also posted pictures for reference as well.

https://rubi.ca/en-US/bathroom/shower-sets/RFA79K01