Your questions both have the same answer (ie it's the same question) but that's a backwards way of thinking about it. You have to consider the cost of lidar at economics of scale, not before.
If your point is that lidar won't be cheap enough even at economies of scale to make a mass market device, then just answer OPs question directly. Your comment is just a restatement in a less intuitive way.
If your point is that lidar won't be cheap enough even at economies of scale to make a mass market device, then just answer OPs question directly. Your comment is just a restatement in a less intuitive way.