One benefit of the "let it crash" mentality - provided the language and runtime has the right set of tools - is that you can focus on programming the happy path

One benefit of the "let it crash" mentality - provided the language and runtime has the right set of tools - is that you can focus on programming the happy path. Simplified example, but if part of your app is a parser, you can write functions that parse known tokens. If the input contains bad data, your parser will crash. Its supervisor will detect this and be able to restart the parser,and can pass an error back to the user. Now, should you add on code that handles known errors more gracefully and provides more info? Absolutely, but you don't have to, and imo that enables a very pleasant programming experience