You're being downvoted because you misunderstood the post you're replying to. They aren't referring to profit margins, but marginal utility—i.e. incremental imp

You're being downvoted because you misunderstood the post you're replying to. They aren't referring to profit margins, but marginal utility—i.e. incremental improvements to stop spacing (purportedly) would not be enough to fix a fundamentally broken system.