The Reference Desk/Rose's frustration of the TARDIS Translation circuit

In The End of the World, why was Rose angry about the TARDIS translation circuit?

When she says that the aliens speak English, the Doctor explains that the TARDIS puts a telepathic field into her head and translates languages. However, she got furious and asks why he didn’t ask. What did she mean? Ask what?

I thought she’d be happy or pleased, because it makes her understand what they’re saying.

Then she ask questions that he refused to answer (who he is and where he's from), making him defensive and very angry. How very surprising.

It makes her understand what they're saying. If she never had a telepathic field in her brain, it wouldn't be able to translate alien languages. She'd hear them speak in their own languages and she wouldn't be able to understand them.