The problem of retrieving cabin baggage in an emergency has been a focus of multiple studies and is extensive, shown to involve up to ~50% of passengers. The technology of remote locking already exists. Better safety instructions are likely important regardless, but i.m.o. only a lock would make everybody consciously aware of the issue and actually adapt behavior and packing habits. You can blame individuals with the best of arguments, but so far that hasn't fixed the problem.
2000; Safety Study - Emergency Evacuation of Commercial Airplanes
https://www.ntsb.gov/safety/safety-s...nts/SS0001.pdf
Page 66: Retrieval of carry-on luggage
2018; EMERGENCY EVACUATION OF COMMERCIAL PASSENGER AEROPLANES
https://www.aerosociety.com/media/85...anes-paper.pdf
Page 44: 9.28 Cabin baggage
(Russian Irkhut MC-21 is already designed with this feature: “Optionally, the bins may be equipped with remotely-controlled interlocking electromechanical locks, and be visually monitored by the cabin crew.”)
Page 71: Recommendation 15 :
"AAs should consider the feasibility of introducing a certification requirement for a means of remotely locking, from the flight deck, overhead bins in passenger cabins that do not contain emergency equipment, for taxi, take-off and landing."
Articles:
https://www.paddleyourownkanoo.com/2...an-evacuation/
https://www.forbes.com/sites/marisag.../#3a98bae3356b
https://www.forbes.com/sites/marisag.../#5048d8593b6b