Because we don't control mass communications systems which are necessary to get the idea out to the public.
Calling them "Marxist Media" in our own tiny little discussion circles will not have a larger impact on the general public.
To make a difference, you need access to 300 million people. Till we get that access, it doesn't matter what we call them, not enough people will hear about it for it to have any significant effect.
Some uninformed person might ask us what we even mean by Marxist media. It could lead to a worthwhile discussion. Many Young people do not even know what Marxism is.
It’s a pyramid scheme. It starts small and spreads like a rumor. This is how THEY do it with lies and it is VERY successful. Only those who are not all in can hamper it from spreading.
Another short story to explain the effectiveness of this... When I was a young man I was in the auto/heavy truck industry, Dad owned a truck stop with auto and truck repair. Too start the apprenticeship much of it was tire patching and repair. One of the guys I worked with in Dad’s truck stop started to tell customers that the sidewall of the just new product radial tires cannot be patched so that he could sell them a new tire instead.
That was never heard of before he did this because the newer tire patches where actually designed and shaped for radial tire sidewall repair. To this day EVERY tire tech will tell you this contrary to the truth. My friend started this concept and the customers themselves spread it across the nation like wildfire. This misnomer is still in effect right now when it comes to patching the sidewall of a radial tire.
This is how it works in reality...