Agile is not meant to make solid, robust products. It’s so you can make product fragments/iterations quickly, with okay quality and out to the customer asap to maximize profits.

“Agile” doesn’t mean that you release the first iteration, it’s just a methodology that emphasizes short iteration loops. You can definitely develop reliable real-time systems with Agile.

You hopefully know thats not true. But it's a matter of quality goals. Need absolute robustness? Prioritize it and build it. Need speed and be first to market? Prioritize and build it. You can do both in an agile way. Many would argue that you won't be as fast in a non-agile way. There is no bullet point in the agile manifest saying to build unreliable software.

The manifesto refers to “working software”. It does not say anything about “okay quality”.