First, let’s identify what the perceived problem is with tradelines.
The main argument against exchanging tradelines is the belief that people are artificially boosting their credit score and, as a result, can obtain credit that they otherwise would not have been qualified for. There are really two elements here: (1) artificially boosting a credit score (2) people gaining access to credit that they otherwise would not have had access to.
Let’s deal with these two issues individually.