Why is Torso nil even though I do a check that makes sure it exists? (SOLVED)

I'm an idiot. Players don't have torsos. Please commence slapping me in the face...

Original post:

I wrote this code to make an NPC watch the player closest to it, as long as the closest player is no greater than 40 studs away. At the beginning of my function, I loop through each player in the server with a for loop, then I do a check to make sure the player's character, humanoid, and torso exists. Oddly enough, however, I continue to get this output error;

15:07:37.911 - Torso is not a valid member of Player
15:07:37.912 - Script 'Workspace.Bot.FaceEnemyScript', Line 24
15:07:37.913 - Stack End

The areas of code related to the problem are as follows;

local hum = plr.Character:FindFirstChild("Humanoid")
local tor = plr.Character:FindFirstChild("Torso")
if plr.Character and tor and hum and hum.Health > 0 then

---

if plr then
	local direction = (plr.Torso.Position - bot.Torso.Position) * Vector3.new(1, 0, 1) --This is the actual line the error appears on.
	bot.Torso.CFrame = CFrame.new(bot.Torso.Position,bot.Torso.Position + direction)
end

And my entire code, for reference;

local bot = script.Parent.NPC

function findNearestTorso()
	local closestDistance = 40
	local target = nil
	for index, plr in pairs(game.Players:GetPlayers()) do
		local hum = plr.Character:FindFirstChild("Humanoid")
		local tor = plr.Character:FindFirstChild("Torso")
		if plr.Character and tor and hum and hum.Health > 0 then
			local distance = (tor.Position - bot.Torso.Position).magnitude
			if distance > closestDistance then
				closestDistance = distance
				target = plr
			end
		end
	end
	return target	
end

while true do
	wait()
	local plr = findNearestTorso()
	if plr then
		local direction = (plr.Torso.Position - bot.Torso.Position) * Vector3.new(1, 0, 1)
		bot.Torso.CFrame = CFrame.new(bot.Torso.Position,bot.Torso.Position + direction)
	end
end

If the torso doesn't exist the code should skip everything else and move on to the next player in the server. If none of the players in the server have a torso that exists, then the function should return nil and never pass the if statement on line 23. Obviously it must not work like this...