Ignoring the overly pessimistic and self-defeating overall tone:
> There is no chance that humanity will ever come back to any pre-industry levels within the next 500 years
How could you possibly predict this? We have moments of time in history which are basically "before/after", and no one saw those points coming until they were in effect. Electricity, atoms, nuclear energy, walking on the moon, transistors, internet, LLMs and more are examples of these things, that were short of impossible, and had lots of people claiming "We'll never do that in a hundred years!", up until we already accomplished those things.
What I'd like to know, is what the point is? Why claim "our civilisation wont last 500 years" and similar, what do you wish to achieve with this? What conversation do you wish your comment to spawn, that people tell you you are wrong? Or right?