No. Lump of labor is saying that the amount of work is fixed and I am not claiming that. What I am saying is that there is an upper limit of how much goods a single person will need in specific area. For example most people are quite happy with owning just one washing machine per family, which usually lasts about 8 years. So if we assume population of 8 billion, family size of 4, we need about 250 million consumer level washing machines produced per year. There is no point making much more of them, because no-one would want to buy them. And every time you increase worker efficiency with automation, you need less workers when making washing machines.
Counter argument is that there is unlimited amount of different machines you can make and sell, like TVs or 3D glasses, so workers from washing machine company can just build TVs. But you will still have limited amount of time, how much you can spend with those devices. Sure, you can buy a TV and just let it be unused, but I think people will have limit of how much unnecessary stuff they are willing to buy.