I always use "one" as an indefinite pronoun, similar to how I would do it in German. Is that wrong?

...and only if one thinks this has a real chance of stopping the offending behavior either in this case or in the future.

or

...if so, one should nonjudgmentally request the offender stop while applying the Principle of Charity to the offender, and if one wants the maximum chance of the offense stopping, one should resist the urge to demand an apology or do anything else that could potentially turn it into a status game.