As others have said in more detail: cost. So they enable remote control to cut costs. They don't want to pay a 24/7 on-site ops center. They take their chances

As others have said in more detail: cost. So they enable remote control to cut costs. They don't want to pay a 24/7 on-site ops center. They take their chances and bolt-on security, and that's how the incentives work today.