I view this a bit like asking "why bother getting a job when I could just get rich at the slot machines"

Knowledge is still power, even in the AI age. Arguably even moreso now than ever. Even if the AI can build impressive stuff it's your job to understand the stuff it builds. Also, it's your job to know what to ask the AI to build

So yes. Don't stop learning for yourself just because AI is around

Be selective with what you learn, be deliberate in your choices, but you can never really go wrong with building strong fundamentals

Edit: What I can tell you almost for certain is that offloading all of your knowledge and thinking to LLMs is not going to work out very well in your favor