Is a router a better device for an IoT botnet than devices within its network

Question

I've read about IoT botnets and how attackers compromise connected devices.

• Would a compromised router be a better botnet control point than individual IoT devices?
• Do attackers prefer to target routers since they manage multiple connections?
• If a router is infected, does it automatically put all IoT devices at risk?

Looking for insights on whether routers or individual IoT devices are more valuable to attackers.