Difficult to get the citizenry to give a rating to every political party too. Ranked choice is nice because you can give your vote to as many, or as few as you want
Nothing prevents other voters to give low ratings to this kind of candidates though. I'm sure with this system far right would get 30% of 7/7, but also 50% of 0/7.
It's not going to make them rate yours higher. You need to actually show the people why they should give YOU a high score. I find this system absolutely amazing and what we have laughable. Barely democratic in comparison..