Earlier quoted context omitted.
It was forward when Newton discovered the beautiful simple determinism of physics. Was it going backwards when the probabilistic nature of quantum mechanics emerged?
Two words: many-world interpretation. More seriously, this is not a fair comparison. Adding LLM output to your source code is not analogical to quantum physics; it is analogical to letting your 5 years old child transcribe the experimentally measured values without checking and accepting that many of them will be transcribed wrong.
Many worlds is, like you just said, an interpretation, and interestingly only one of many!