Yeah. It is a big plus sign for me too!
Maybe they did error and did meant that RPG light is minus feature. Use energy for nothing is really bad feature indeed!
There were not many reasons for 'cons' for the cooler, although the simplest approach here being that not being able to choose whether RGB lighting is on or off lends itself to being 'not an option' for those who might be seeking RGB or at least have the ability to toggle it. However, the primary point of be quiet! and Noctua coolers is that they focus on quiet operation, performance and build quality over flashing lights. I do understand this completely. Again, this ends up being a totally different question as to whether those users should simply seek another solution as RGB is more important overall than performance and build quality.
be quiet! and Noctua take a different approach than others do, lending them to have a focus from a different market segment overall. By this virtue, the general public as a whole might see this as a loss whereas a performance-biased user will certainly see this as a win.
In writing reviews, most of the overview like this is done with the entire consumer market as a whole in mind, and not specific to those who might only be looking for a non-RGB solution. Therefore, 'no RGB' can either be seen as a 'win' or a 'loss', depending on which side you favor, but if you were to poll 1 million random users, consider the responses as to what might be the result if asked whether this cooler lacking RGB is a pro/con.