Havertz is worth over 100 million pounds, broja about 50 million, aubameyang is 33years and cost only 20 million+. The value is determinant. If havertz gets injured aubameyang will be a great support for broja. We had numerous injuries in attack last season.Aubameyang isn't a conventional no. 9 and will also provide support for Sterling and mount when on the wings. Look at what our closest competitors last season spurs have got in attack (kane, son, kulisevski, richarlison, perisic, moura) for 3 positions, highly experienced. With Werner and Lukaku gone we lack experience from the bench and there's a world cup mid season so starters will burn out surely. Competing for EPL, UCL and world cup in one year is crazy for players like mount, havertz and Sterling who give everything on the pitch so they will need rest and aubameyang can replace all three.