I think you should have phrased your initial statement differently. Instead of "a female Saiyan", you should have said "that female Saiyan" or used her name.
Let the joy of love give you an answer! Check out my book!This conversation has caused me to realize that Goten is the only half-Saiyan brat with spiky hair.
My Tumblr. Currently side-by-side liveblogging Digimon Adventure, sub vs dub.Gohan's got spikey if he let it grow out.
Let the joy of love give you an answer! Check out my book!Pan will perform Namekian Fusion with Piccolo before she gets to be a Super Saiyan.
My Tumblr. Currently side-by-side liveblogging Digimon Adventure, sub vs dub.To be fair, Vegeta would totally train Bra to become a Super Saiyan - if only so he can't be mocked for it by Goku (after all, all of Goku's kids became Super Saiyans, and Goten totally beat Trunks to it too).
himitsu keisatsu seifu chokuzoku kokka hoanbu na no da himitsu keisatsu yami ni magireru supai katsudou torishimariYes, but that was before they had a conversation with dead Goku, and before they learned dead Goku would be coming back to life. Vegeta's will to fight, or lack there of, was based around Kakarot's presence, or lack there of.
Vegeta's refusal to train Bulma and abandonment of training Trunks in favor of keeping to himself has no such factor and thus is nonequivalent.
Buldogue's lawyer

Disappointed that a female saiyan doesn't have spiky hair.
It's not like it can't work. I've seen it plenty of times.
himitsu keisatsu seifu chokuzoku kokka hoanbu na no da himitsu keisatsu yami ni magireru supai katsudou torishimari