The 4K signal that comes to your home is heavily compressed. If you do some googling on it, you will find that the bandwidth of 4K Netflix only runs at 16Mb/s. That's about 1/3 of what Blu-ray 4K runs at. These all use the latest compression algorithms to get the best possible results. But, once decoded, with full audio and video, the uncompressed video sits at up to 18Gb/s. This is a thousand fold increase in the bandwidth.
It is also why there are times that people really do complain about the quality of the video they get from streaming services.
In my opinion, if installing/removing the cable is easy enough to do, I would just get an active Redmere cable and see how well it worked. Nothing wrong with fiber HDMI cables, but they ain't cheap for darn sure. But, I guess if you've already paid for a RS2000, then the $250 or so cable isn't all that expensive.