Are you jacking into your car’s OBD port and messing with the engine timing? There’s a difference between using a known tool in a controlled way and giving the tool to a hallucinatory goblin (or overconfident intern) with the directive “do it for me”. You don’t have to know everything about the tool to know what it does, or to tell if it’s doing something it shouldn’t (like malware). What happened to the old advice given to tech neophytes, “don’t run random scripts from the internet if you don’t know what they do”?

Many many people care more than the end product, for example whether a shirt is made of cotton with the forced labor, carbon emissions of public transport, etc.

In terms of engineering software, you care the cost. An intelligent agent may try to read unnecessary files and it's time to stop it to save tokens and avoid polluting the context.