These pronouns are ingrained in our Spanish-speaking culture, and as we use verbs, we swiftly use the terms, necessary to address whomever we are speaking to, not giving it much thought.
Countries vary their use of pronouns. Vosotros is only used in Spain, which is you plural. However, other countries skip it and go for ustedes, formal. Argentinians use vos for tú.
It becomes a bit confusing because you want to be respectful with the use of usted. Yet, this use, in some instances, might come off as insulting by making the person feel old. Since we usually address older people by usted.