Why are dashes rather than parentheses or commas used in this sentence

-Parentheses are used to set off a participle word or words which can be omitted, but does not affect the whole thought of the sentence. In addition, parentheses could also be used to add a specific detail about the word beside it.

-Dashes are used to set additional information off. Dashes are commonly used if the words it enclosed already has a comma or commas in it, just to avoid confusion.

you need to explain that more, your grammer just needs to be close to perfect.

i would say it means that you're never alone, that there will always be people supporting me and showing me that they care for me and love me

explanation: