So I guess less likely to self-insert = more likely to like NTR?
You are making a false equivalence.
You cannot simply state that because you choose to self-insert and do not like netorare that the the opposites are true or prevalent for a population.
There are those who do self-insert who enjoy netorare.
There are those who do not self-insert who enjoy netorare.
There are those who do self-insert who do not enjoy netorare.
There are those who do not self-insert who do not enjoy netorare.
There are those who do self-insert who hold no prevailing opinion about netorare.
There are those who do not self-insert who hold no prevailing opinion about netorare.
We are not aware of any empirical data which quantifies any of the above statements.
All you can state is what you know about yourself and what others share - this is anecdotal data. And while anecdotal data is interesting and can be used as examples to describe empirical data, it cannot be used to draw conclusions.