The spacial cahracters handling varies up to the section, you got measurement, tags, and values.
see the docs
Line protocol accepts double and single quotes in measurement names, tag keys, tag values, and field keys, but interprets them as part of the name, key, or value.
In your case, you are referring to tag values, and tags are always and only saved as strings. (no matter if numbers, booleans, or whatever, it will be stored as a string), and as stated above quotes will be part of the value itself.