The question of free will always comes down to the question of causality and determinism.
Therefore, it really doesn't matter if there is free will in our lives as long as you can close your eyes, throw your hands in the air, have fun, and make it through...
It matters because the self rests in the space left by a break in the causal chain. The question of responsibility relies on the ability of the individual to be a breaking point by conscious decision. And so it comes down to the nature of consciousness and what it means to be aware.
If it turns out that I have no real choices then the house of cards falls to the ground.
Suspension of disbelief is ok for the rollercoaster but not so much for the contemplation of existence.
Being a "product of your environment" looses practicality if every individual has their own unique environment.
I am not sure I get what you are saying. Practical or not, we are products of our environments and each one is unique.
People are a product with their environment, not of it. Our wills are, actually, free to operate within their boundaries. That we decide what we will actually do is what puts the onus of our actions upon ourselves.
How would this apply to something like sexual orientation or taste in music? Do we choose the things that we find attractive and is resisting a desire more of a choice than giving in to one?
It seems to me that our volition is just a calculator always trying to balance the equation in our favour. Not unlike an autonomous car safely navigating the way.