The point of doing things is the act of doing them, not the result. And if we make the result easily obtainable by using an LLM then this gets reinforced not destroyed.
I'm going to use sketching as an example, because it's something I enjoy but am very bad at. But you could talk in the same way about playing a musical instrument, writing code, writing anything really, knitting, sports, anything.
I derive inspiration from other people who can sketch really well, and I enjoy and admire their ability. But I'm happy that I will never be that good. The point of sketching (for me) is not to produce a fantastic drawing. The point is threefold: firstly to really look at the world, and secondly to practice a difficult skill, and thirdly the meditative time of being fully absorbed in a creative act.
I like that the fact that LLMs remove the false idea that the point of this is to produce Art. The LLM can almost certainly produce better Art than I can. Which is great because the point of sketching, for me, is the process not the result, and having the result be almost completely useless helps make that point. It also helps that I'm really bad at sketching, so I never want to hang the result on my wall anyway.
I understand that if you're really good at something, and take pride in the result of that, and enjoy the admiration of others at your accomplishments, then this might suck. That's gotta be tough. But if you only ever did it for the results and admiration, then maybe find something that you actually enjoy doing?