Wrong, Gen. Giap is Lenient general, he didn't want to sacrifice his soldiers to unify VietNam at All cost, but General Secretary Le Duan thought in diffrent way .He thought 'No Pain, no Gain', so he decided to launch a full scale attack in 1968.
We couldn't unify VN in 1968, but The Tet Offensiv was a strong warning to US's army that:"VN's army can attack them any time, any where we want, even their safest place like US's embassy in SaiGon".
History proved that: if we try to reduce casualties when fighting with supper power like US, we never can defeat them bcz US has lots of powerful weapon like CBU-55, that can kill 2,500 troop in single blast, and US's weak point is just The fear inside US's soldier mind when fighting in long and hard war.