Using a spa air switch over an electronic switch has several benefits. One of the main benefits is that it does not require any electricity to operate, making it safer to use in wet environments. It is also more reliable and durable because it has fewer components and does not require complex electronics. Additionally, it is easier to use because it only requires a simple button press, compared to an electronic switch that may require programming or complicated settings. Overall, a spa air switch is a simple, efficient, and reliable way to control the pump in a spa.