As it seems you’ve already found out, SharpTools automatically pulls in all of the available commands that a device has. While the most useful ones for a widget are lock, unlock, and toggle, many of the other commands are particularly useful if you use Tasker for automation.
I could see a use case where you might want to have a widget that lets you quickly set or delete a code, so those methods are always there if you want to use them.
If you are looking for something more fine-tuned for managing locks, I would recommend one of the dedicated SmartApps like the one you found or the one by @ethayer:
PS. I’m the developer of SharpTools, so feel free to PM me or tag me (@joshua_lyon) if you have any questions.