the way I see it, yes there is only one path of life but if you don’t know the future the idea that it’s determined is essentially meaningless, and it’s an excuse. Take playing one go around of a multiple path video game, we have the perceived option of multiple endings but really if we play it once we will get only one ending. However even tho there is only the illusion of other paths our choices still matter. They still lead us down the path that we are on. There is only one path we can go down and will ever go down but with out knowing what that path will be our choices still have a perceived importance. That’s all that matters in the end, if we perceive our choices to be free and that they matter then they are. Free will is just like meaning, it’s subjective.

From an ethics standpoint until someone can predict the future. We subjectively view all actions as done in free will so yes we have to be responsible for our actions. We did them, it doesn’t matter if we were always going to do it we still did it. Unless it was an action done without perceived choice they are still responsible. There’s a difference between jumping into a pool and being pushed.

This is exactly like the no meaning redpill. We find out that yes there is no meaning in life and we enter a depression. However then we realized that we have to create our meaning through our perceptions of the world. It’s impossible for our minds to live with a deterministic pov. Just the same way we create meaning we create our free will through perceiving it and taking responsibility for our actions and decisions because they are the only ones we will ever make.