Yea that's incredibly bad if that's what that guy did.. in general for EE designs, the schematic/layouts are not that hard to deduce how you would do it if you are in contact with the company that makes the LIDAR device (the unique and difficult part -- basically just need to ask them, like "yo, how roughly should I interface with this thing and whats your recommendation on a number of the components.. and can you give me a reference schematic.."). So copying stuff means that the guy actually probably was clueless as to how it actually worked and planned to just hand it off to somebody else who did understand it -- so definitely super bad...