There are a whole lot of steps in between having a netlist and having useable hardware. Normally, if you're a large company, you have a small army of engineers

There are a whole lot of steps in between having a netlist and having useable hardware. Normally, if you're a large company, you have a small army of engineers handle that process and occasionally tell your architecture people that they need to fix up their designs here or there. When you target an FPGA, which is really more of an abstraction on top of silicon just like CPUs or GPUs are an abstraction on top of silicon, you're effectively paying them to do this process for you and mediate it via the software stack. There's plenty to debate about where the boundary should be, but an almost universal constant is that ecosystems ossify around interfaces, so hardware companies will generally see giving up control as a borderline existential threat unless they're in the business of fishing pennies out of the gutter for margins.