Why pass params via stdin instead of via cli args ?

[noelzubin]

2797316#diff-cd2cce8647efdde8ee95787dde1150aa661e26dbe52f56fa0e5257ec8e82ece2R74

I was wondering why use stdin to pass parameters instead of args itself.
eg: Either

 hackernews.ts browse '{"topic": "rust"}'

or use

hackernews.ts browse --topic "rust"

The second approach also resembles what sunbeam run command expects.
Passing them in the args itself makes them easier to test, or use the commands standalone(without sunbeam).
Are there any advantages/usecase to use stdin to take in params ?