It is great that you are sharing your ideas but I  think that you are extrapolating your individual experience to a much broader conclusion.  There is a whole range of responses to injections/treatments that need to be considered when drawing conclusions as not everyone responds to injections in the manner you mention. There is also a fair amount of research that needs to be considered such as the research indicating that inhaling certain substances affects receptors which in turn affects the sensation of congestion. In addition, the situation that you are describing is not unique. Dr. Houser has for a long time stated that one of his main goals with implants and injections is to redirect the air towards nerves/receptors that are undamaged. In fact, the idea of the "cotton test" is to redirect the airflow to see if the sensation improves. Someone that is responding well to the "cotton test"will have better sensation without any actual treatment performed on the turbinate. In your case, it is likely that you have some damaged tissue as well as some healthy tissue. The injections likely swell your turbinate so that the airflow is affected and is able to move across healthy receptors and thus you sense the airflow better. 

I think that you are correct that there is scarring damage that can affect the blood supply and this can be one of the impacts on the unhealthy receptors as well as causing difficulty for the turbinates to properly swell as part of the nasal cycle. But, what does it mean to to say that what is injected "activates the turbinate?" It is unclear to me what mechanism you might be referring to.