I would advise against it. As mentioned elsewhere, I wouldn't be put off by the scaremongering you read. I walked from Lugo to Santiago (including the part from Melide to Santiago during the busiest time of year). In the part after Lugo, including the part after Melide, I can say with certainty that I had just as much solitude as I had on the Primitivo before Lugo. All I needed to do was stop in Salceda and Lavacolla instead of in Arzua and O Pedrouzo as others were doing.
You develop a rhythm and mindset measuring a country day after day with your feet. It is more than interrupted when you take a bus or train elsewhere and resume. I think you are better off with a continuous journey. Save the walk from Ourense for a future Camino where you walk the Sanabres.
But that's just my opinion.