1. Students now rely much on it for their assignments and it's almost difficult to engage the brain in constructive reasoning since AI can always come through for them
Do you have any sources that tell students uses it excessively, and in which country?
2. It has affected the graphic space since you can just do an AI portrait, or simple graphics for yourself using the AI tool, and the graphics guy is technically not needed anymore.
3. The coding guys are not even left out and although it has its advantages in all these sectors I feel it also has done a huge damage in increasing the rate of laziness on the part of the youth.
Not entirely. The designer is still needed. They may be able to generate an image based on prompt input, but as far as I am concerned, they still lack the ability to generate a wonderful logo. Besides, there are other aspects like User Experience, which require human perception.
This also applies to code. Any system that is complex enough, and even a bare essential functionality of a simple system needs to be tested. The one who has the ability is of course the engineer. It would be a catastrophe if a system is purely coded by an AI without human intervention. By human intervention, is the thing that sensitive for example security and many other things.