I think sometimes people develop not-so-healthy "coping" controlling or avoidance strategies that manifest in different forms throughout life unless we recognize and understand them, then make efforts to do it differently. Many of these tend to be very ingrained and hard to change behavioral tendencies, I think this is why a T might be interested in past ones. For example, I had different issues with self-defeating control and excess such as an eating disorder, substance addiction, excessively using various things to avoid/escape something I don't want to deal with momentarily. For example, when someone has addictive tendencies, they often trade one for another in a long chain, another example could be engaging with abusive people repeatedly. If you have difficulties fearing judgment in various situations, that might also be something like that. I think it can also be helpful to revisit how you were able to get out of unhelpful strategies in the past and develop new one - what worked in the past might work again to beat something current.

In general though, I agree with those saying that you do not have to disclose to your T anything you don't want to. It is perfectly okay to tell them you don't want to talk about XYZ. I did that sometimes in therapy because he T seemed specially interested in a particular topic but I felt it was irrelevant to my problems or who I am. I don't think therapists are psychic or even wiser than the average educated person, they make a lot of guesses and assumptions, especially when they don't know someone well yet. What, I think, is worth doing though is assessing whether a topic is truly irrelevant or there is some more complex insecurity/avoidance associated with it. I personally would have liked my Ts to be more inquisitive and probing into my avoidances and BS instead of just accepting everything. It is not easy to do well though and can lead to serious misunderstandings, why it is useful to tell them directly if a topic is relevant/wanted or not.