When photography first began to proliferate in the 19th century, people feared that it would replace the art of painting [1]. Photography is used for some practical applications where painters were once employed, but we still paint and draw things. Ultimately, the two mediums are distinct in their aesthetics and expressive abilities.
Using that situation as a reference point, I'm not totally convinced that AI art will supplant digital art/drawing. AI art can be used to produce some types of drawings, sure, but not all types of drawings can be convincingly produced using AI. AI's stylistic and compositional abilities are constrained to its training set, for example.
Another thought: when the DSLR became affordable in the early 2000s, it wiped out an entire segment of low-level professional photographers. Suddenly, any schmuck with a DSLR could take "good enough" photos with ease, and without the friction of film. I'd expect AI art to have a similar effect in the realm of digital illustrators. But, professional photographers still exist, and so will professional illustrators.
Using that situation as a reference point, I'm not totally convinced that AI art will supplant digital art/drawing. AI art can be used to produce some types of drawings, sure, but not all types of drawings can be convincingly produced using AI. AI's stylistic and compositional abilities are constrained to its training set, for example.
Another thought: when the DSLR became affordable in the early 2000s, it wiped out an entire segment of low-level professional photographers. Suddenly, any schmuck with a DSLR could take "good enough" photos with ease, and without the friction of film. I'd expect AI art to have a similar effect in the realm of digital illustrators. But, professional photographers still exist, and so will professional illustrators.
[1]: https://daily.jstor.org/when-photography-was-not-art/