Gone the way of the forgotten 'bumfish', I guess; human errror.
But good aviation engineering - especially the making of cockpit interfaces - has always tried to take into account, the inevitable failings of pilots. There's a reason the gear lever has a little wheel on it. And the flap lever doesn't.
Anyway, the NTSB report was not impressed with the design of that gust lock, either:
Tests and Research:
Flight Control Lock
Examination of a similar airplane confirmed that, with the control lock engaged, although the ailerons and elevators were completely locked, the rudder and tailwheel could still be moved to near full travel, such that the airplane could be maneuvered almost completely unhindered while taxiing. Although the control lock is painted red, the pilot’s view of the lock in the engaged position is such that the lock is viewed at its narrowest profile, directly down its length.
Another 1019 series airplane owner relayed his experience with the flight control lock. He stated that, on one occasion, he had planned a local flight with a passenger in the back seat and became distracted and forgot to remove the flight control lock before flight. He was able to taxi for departure, still unaware that the lock was in place, and became distracted during the pre-takeoff checks because he was talking to the passenger. He stated that he was able to complete the initial stages of takeoff with the control lock engaged, and once he realized, he had to struggle to remove the lock due to the forces on the control stick during takeoff. After a few seconds he was able to free it, and the flight progressed uneventfully.
The pilot’s friend, who had delivered the airplane, stated that you could easily get into the airplane with the control lock engaged. He further stated that, like most tailwheel-equipped airplanes, heavy differential braking was required to steer the airplane, and only limited rudder movement was required. Following the accident, he performed a series of checks in a similar airplane with the control lock attached. He determined that the airplane could be taxied uninhibited with the control lock engaged. With the control lock engaged and the airplane parked, he could not remove it with reasonable force if there was any control pressure on the stick, because it appeared to hang up on the lock pin until he released pressure
https://s30121.pcdn.co/wp-content/uploads/2022/07/Snodgrass-SIAI-Marchetti-SM-1019B-NTSB-Final-Report.pdf