Print usage on input without commands/args/flags

In the scenario of app invocation from terminal without _any_ command/flags
```bash
> my-app
```
I'd expect the same output of:

```bash
> my-app --help
```

Instead, I have the error about the missing command.
```bash
my-app: error: expected one of "cmd1", "cmd2"
```
Is there a way/configuration to achieve my expected outcome?

The closest function I've found is ```kong.UsageOnError()```, except it prints usage help for any error (when for any other type of error I'd expect to just print the specific error).