There is another factor that many people who do bareback porn take into account. Well… It's split up into two different parts. The first is the viral load.... Simply put, a number of studies have been done in the last few years to attempt to quantify the risk of HIV transmission particular to unprotected gay sex. The interesting thing is that in every study, they all noted that there has not been so much as one case of HIV transmission from an HIV+ person with an undetectable viral load. This is one factor they often look at. If the person is undetectable, a lot of people will decide to participate anyway.
The second factor to take into account is whether or not the person who is not HIV+ is on PrEP. The down side to PrEP is that it too is not exactly a guarantee. It was only noted to substantially reduce the risk. A lot of people who are not and do not want to become HIV+ but do bareback porn will also use PrEP..... So the single answer to the question would be no... It's not a culprit for AIDS.