You, without any clear credentials in the field, make a bold claim that flies in the face of the standard medical understanding of cardiovascular health. And - when challenged - you twist the argument around and ask your interloper to defend the scientifically standard model.
Elevated LDL is associated with CVD, and is - in itself - an independent risk factor for developing CVD.
The _extent_ to which this is true seems to be an open and unresolved question. The scientific understanding of this interplay between LDL and CVD may shift over time, and there may well be breakthroughs in the years to come, but that is the medical consensus and one should need significantly clear evidence that to the contrary.
Not that you are on this level right now, per se, but this is how anti-vaxxers operate too. This is pick-your-facts pseudo science. This is spreading misinformation that less-informed people might make decisions on.