How could I modify this existing zombie pathfinding script to also attack buildings?

Help and Feedback Scripting Support
1

Currently making a zombie survival game with a building system. I’m using a pre-existing zombie pathfinding system since I don’t know how pathfinding really works and am currently too lazy to watch an hour long tutorial. It works great, the only issue is that the zombies will stop following the player if the player boxes themselves in. I’ve already made it so the buildings take damage, it’s just this one issue.

Lines that are responsible for pathfinding to a player:

function GetTorso(part)
	local chars = game.Workspace:GetChildren()
	local chaseRoot = nil
	local chaseTorso = nil
	local chasePlr = nil
	local chaseHuman = nil
	local mag = SearchDistance
	for i = 1, #chars do
		chasePlr = chars[i]
		if chasePlr:IsA'Model' and chasePlr ~= zombie then
			chaseHuman = getHumanoid(chasePlr)
			chaseRoot = chasePlr:FindFirstChild'HumanoidRootPart'
			if chaseRoot ~= nil and chaseHuman ~= nil and chaseHuman.Health > 0 and chaseHuman.Name ~= "Zombie" then
				if (chaseRoot.Position - part).magnitude < mag then
					chaseName = chasePlr.Name
					chaseTorso = chaseRoot
					mag = (chaseRoot.Position - part).magnitude
				end
			end
		end
	end
	return chaseTorso
end