Instinct 2 Golf Satellite Selection

Why is it not possible to manually select which satellites I want the golf activity to use (like other activities)?

I would like the watch default to be ‘all systems’, but I only want GPS for golf (as it’s mostly out in the open and doesn’t need the battery drain).

When I change the watch default setting, the golf activity time estimate changes proportionally, so it’s mirroring system settings, but there is no way to manually select a satellite system within the golf activity…