Why does it teleport players who have not touched the object?

local boat = game.Workspace.movingboat.MovingModel
local TeleportService = game:GetService("TeleportService")
local code = TeleportService:ReserveServer(6597645798)

local placeId = 6597645798

local function onPartTouch(otherPart)
    local player = game.Players:GetPlayerFromCharacter(otherPart.Parent)
    local players = game.Players:GetChildren()
    if #players >= 4 then
        wait(5)
        TeleportService:TeleportToPrivateServer(placeId, code, players)
    end
end
script.Parent.Touched:Connect(onPartTouch)

Help, lol. It seems if there is 4 people in the server, it will teleport all the players even if they have not touched the desired part.