it would have to ignore underscores as well. does your grep have that functionality bundled under a convenient flag? does your browser's ctrl-f have it for eg. github?
It doesn't. But it should, just because the limitation is the tooling doesn't mean we should give up on this. Instead we should assume that the tooling will evolve. Even if the language is not style insensitive, this kind of search is still useful since you often are not sure what convention was used.