If a scientist studying cancer calls cancer terrible in a casual conversation, they can still produce valid rigorous work about it. We'd have approximately zero

If a scientist studying cancer calls cancer terrible in a casual conversation, they can still produce valid rigorous work about it. We'd have approximately zero research done if we disqualified everybody with a personal opinion about what they're studying. No one's unbiased, but basic science methodology helps us reveal and eliminate/compensate for our biases. It doesn't matter whether you personally think oppressing human freedom is terrible or not—your work will not be any less useful. Its results may even challenge your own subjective opinion on the matter.