I have 8+ experience in graphic design field. I did not feel that drawing is necessary for me but now day in last 1–2 year I feel that need to know drawing as well. because now a day competition in creative industry are very high and copyright policy is vary strict. that’s why we need to create every design original and creative.
So, if you know drawing. I will able to create design more creative and original then others. Drawing will help to generate idea fast and create more options. because sometime we spend much time in google searching and get nothing. that time drawing help much.
Specially in logo design drawing is very helpful. I worked on many logo design contest site as designcrowd, 99design, freelancer etc. and win 200+ logo design contest and many more. You can check out my logo design profile on youtube Kasturi Lal
Hence, I can say drawing will definitely help for graphic designer. if you learn it Starting face that will very good.
Hope That help,
Thank you.