It's harder to sympathize with "it's ok to write shit code if failure doesn't mean a literal explosion or being literally stranded on Mars" after a completely preventable identity theft...
Its especially hard when that mentality doesn't account for future feature requests or maintenance. The original developer happily moved on to botch another project while you're the one fixing up the mess.
Also, how come software is either a "web app" or a "rover". There's a huge spectrum in between. Not everyone writes CRUDs; even if these types of applications are usually the worst to maintain because they are developed so carelessly with little regard for simplicity.