I guess ultimately the end process is what's important, there I agree with you. However, with ethical issues, or matters of principle, you could argue time is of the essence.
For example, if the Western world had taken 30 more years in embracing the importance of LGTBIQ+ rights, we would be now at the same place as the likes of Russia or Saudi Arabia, which is a place we feel good about not being.
So in a way yes, the end result is what matters, but in the meantime it does kinda sucks to live in a society that normalizes something that will undoubtedly be considered morally wrong and unethical in the future