Actually no,moksha is only his one of the activitie.In birth chart ketu represents moksha,eye sight,land,property,gold,pride,spouse,childern,business,happines,knowledge weather it is good or bad,unexcpetd profit or loses it depends upon ketu postion in birth chart.
Role of ketu
Ketu gana gives us in this life like unfullied duties in previous life that we have to do in this life.Like if ketu in first house that person have perfome duties regarding him slef.In second house he/she has to work for family.In third house work for siblings,relatives,job,profession.In fourth house work for mother and family also.In fifth house for ANCESTRAL God ,childern.In sith house need to work for uncle ,aunty.have to face debts,health issues.In seventh house for spouse and partneship business.In eight house for heritage duites.It is not good for ayu(life).In ninght house for father and his/her religion also.For 10th house for job ,society and govt.Elventh house for elder brother/sisters.Twleth house for moksha.It is also depending upon which palnt situatied in that house.