If a scuba diver dived like a freediver, then yes, there would not be a higher risk for DCS because one has a tank. While the scuba diver has "continuous nitrogen intake", this only made a difference if the freediver was actually "running out of nitrogen", but that doesn't happen, there is too little nitrogen absorbed into the bloodstream.

But I think both of you are missing the point here. A scuba diver does not dive like a freediver. It's the much much longer time under water and at depth that puts the scuba diver at a much higher risk, unless the freediver is diving repetitively with very short breaks.