It is disappointing that you thought there was too much reference to the earthquake that destroyed downtown Christchurch and killed so many people. However, it is an absolute exaggeration that most of the tour was about earthquakes. The tour starts in Lyttelton and the driver talks about both the history of the port and the geography, then you drive through the inner bays of the harbour and whilst enjoying the spectacular scenery learn something of the Māori history in the region. Travelling over Dyres Pass with views of the Canterbury Plains and Southern Alps you learn more about the geography and the history of Christchurch. You visit gardens and beaches on the tour and it is only when you arrive in the central city that there is focus on the earthquakes as the damage is still there for you to see and the rebuild that is taking place. Everyone experiences things differently, however, you only need to see the number of 5 star reviews for this excursion to appreciate that your views are well and truly in the minority.