The vehicle in front is parking in front of a taxi-only space for a single taxi; where it is waiting it would block any turning vehicles, such as, say, a bus.
Why would one expect a bus to be turning here? For the same reason the taxis and the cars are here: this is the bus station.
If you are doing dropoff or pickup by car, these two spots are the only places you can do it. Of course they are going to wait here. It's inconvenient, but the only alternative would be a short stay dropoff zone, like round the corner at the BRI, and as everyone who goes past that knows, it's a medium-stay-sit-in-the-car zone which wouldn't be any good for trying to drop someone off at the bus station.
This leaves three access options to the long-haul bus network
- FirstBus buses which may or may not work
- Parking for six bicycles
- Space for two cars to park on the pavement, so stopping all buses