My only contention against an expansive style of play vs another team is when there's a massive disparity in the quality of both teams. When Manchester United played low blocks vs other 'Top 5' teams, it was due to their lack of quality. Therefore, it was largely accepted not 'fully'.
However, when you claim you are the best team on earth (i.e. Saliba > Rio/Terry, Gabriel > Vidic, etc.) You can't defend the style you presented yesterday unless you are willing to admit that you are NOT the best team and PSG had a HUGE quality advantage over you. You can't have it both ways.