trouble with script that welds all parts in workspace to other touching parts, any ideas?

So I'm making a round based survival game with terrain and I'm trying to find a way to weld all parts that are touching to each other on command and so far i have made this script. I need some sort of code that does this or else I will have to make a line of code for every weld that needs to be made, and with hundreds of parts, this would be incredibly time-consuming. Honestly even just knowing whether or not Roblox can support this would be really helpful

local function weldBetween(a, b)
	    --Make a new Weld and Parent it to a.
	    local weld = Instance.new("ManualWeld", a)
	    --Get the CFrame of b relative to a.
	    weld.C0 = a.CFrame:inverse() * b.CFrame
	    --Set the Part0 and Part1 properties respectively
	    weld.Part0 = a
	    weld.Part1 = b
	    --Return the reference to the weld so that you can change it later.
	    return weld
	end
	 
	 
	 
	 
	 
	for _,part in pairs(game.Workspace:GetDescendants()) do
	   if part:IsA("Part") then     ---- or part:IsA("MeshPart")
	        for _,touching in pairs(part:GetTouchingParts()) do
	            --weld(part,touching)
	            local weldOne = weldBetween(part, touching)
	        end
	    end
	end

You could put all the items you want welding together into a model, in workspace, and just change line #17 to fit it.

Otherwise you can use CollectionService to get specific items in which have a 'tag' attached to them.