I understand (and support) opposition to contact tracing by badly designed technological solutions, but what is your argument against manual contact tracing? (actually asking people one-on-one who they've been in contact with if they test positive to Covid-19)

I'm just after your reasoning. I promise I won't deride your decision in any way (and I hope others refrain from doing so as well). People react differently in extreme situations, and I try to be aware of as many different reactions as possible, and possibly try to understand the reasons for those reactions.