If that person is passionate and determined about that issue then why not? This may sound hypocritical but here's how Iqbal puts it in one of his Persian couplets:
And my all time favorite from Iqbal:Someone (a divine voice) asked me, are you happy with the way this world is
I said no
The answer came: then go smash it up and make it the way you wish (it to be)
Khudi ko har buland itna kay har Takdeer se pehle
Khuda bande se khud poche bata teri raza kiya hai.
"Raise thyself to such heights,
That God Himself may Ask-
What do you wish me to write your fate ?"