Then the answer is naturally no. There are many famous players among professional players who are D-flashes. For example, in the singles position, the most representative players are Xie Xi and Ma Lin. These two players often use D-flash, but according to incomplete statistics, Sheng Gunge, Khan and Nuguri have been using D-flash, while PDD and Highland Equal players are F-flash. In contrast, I think that MLXG and Dandy are both representatives of D-flashes in the opposition, but other than that, factory director Xiao Tian and Casa are both F-flashes.
Compared with the position of playing wild, the player who flashes F should be better. If you are single, there are more people who flash with F, such as Faker, Scout and chovy. In these top singles, F flashes, while D flashes seem to be Knight and Perkz. In the position of ADC, the distribution of D flash and F flash is similar. For example, several ADC players such as JKL and LWX are all D flashes, while UZI and lmp are all F flashes. Finally, the distribution of auxiliary devices is similar to that of ADC. For example, Liu Qingsong and Mata are both D flashes, and Xiaoming and Wolf are both F flashes.
On the whole, in fact, the position difference between F flash and D flash is not particularly big, except for singles, other positions are similar. Therefore, if you don't know the players who have requirements for singles, there should be no need to learn F flash, just try to be comfortable!