after trunks warns them of dr. gero and the androids, bulma (the only sensible one it appears) suggests using the dragonballs to find dr. gero's location and kill him before he can even make the androids, thus saving the world and preventing any senseless deaths.
the z-fighters disagree with this plan because they want to test their skill against the androids
you know how many innocent deaths the z-fighters must've caused because of their selfish thirst for battle? lol sad thing was it wasn't just the saiyans, even piccolo and tien were bout that life
thats some sociopathic shyt
another example is goku & vegeta both crushing the potara earrings (when they could've beat kid buu easily if they fused) just so they could test their strength individually against him, even though the entire damn universe was at stake. to make matters worse, in order to decide who should fight first, they play rock, paper, scissors in a light hearted scene
even though their sons were both just killed by buu