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the pilot isn't the expensive kit, although the flight-hours to train them may be. Even an unmanned NGAD will probably cost ~500MM.
The key financial advantage of drones is that they don't need money to live after work, health insurance, or a pension plan. It's expensive to ask people to risk their lives for work.
And specifically for forward deployment scenarios: they don't require human support infrastructure pushed forward, at great cost.
Even in austere military terms, it's logistically expensive to keep a human alive on a random atoll in the Pacific.
The aircraft:supportHumans ratio is a tyranny in that each of those supportHumans requires their own support.