Scandinavian countries do not go that far. This privilege is only granted to parents. The goal is NOT to give people the right to go on un-paid leave for any reason, but rather to promote gender equality as well as encourage people to have children. (The latter to prevent birth rates to fall too far below the replacement rate.)

The Scandinavian economic model relies heavily on high work life participation for funding, so encouraging people to take time off for other reasons would not make sense.