[fool1471]

Yes absolutely this.

The major issue is that there are a lot more stake-holders in a schematic design than just the person who draws it.

Often the person who draws the schematic is not the person who lays out the PCB, so the schematic needs to encode information about how to lay the PCB out. For example, you may have several components in parallel in a filter circuit; the order that they are placed on the schematic can be used to communicate which order they should be placed on the board (but does not affect the electrical correctness of the schematic at all), and this in turn helps to betray the function of these components.

Even if the whole PCB design is being done by one engineer, other engineers need to be able to review it. If a schematic is electrically correct but otherwise a mess, it makes reviewing it a lot more difficult.

Then there will be third-parties who need to read the schematic and understand the design - for hobbyist products this could be the end-users, and in consumer products it might be service engineers. A well drawn schematic makes a PCB easier to understand and therefore easier to debug, repair, and modify.

In the analogy of software vs schematics, schematics are both code and documentation at the same time.