Where it does not helps, software engineering is a field where you have to actively practice it to make sure your mind remembers the trade offs, different paths you have evaluated before, sort of building muscle memory. Using LLMs mean that eventually your debugging skills, ability to understand some one else code would degrade and moving to the next level in terms of software competency may never happen for you.
A concrete example, the ability to remember 10 digit phone numbers was really normal before smart phone, try to push your mind now to see if you are still able to do that?
Lastly, at any given point of time 90% of the engineers were working on managing the existing code base, so career wise with so much code being written the job safety should not be an issue if you have skills to understand and debug some one else code