50 might be MCT but that does not mean that you should not worry about missing connection.
And KLM is not selling that connection LAX-AMS-CPT anymore. Maybe they are risk averse?

I can understand that they might reroute you via LHR if flight LK602 is delayed. But means departing LAX at 13:45 local time on day t (say leave home 3 hours earlier). Then getting in CPT at 10:00 local time on day t+2 (say arriving hotel at 11:30), In the meanwhile enjoying 4 different airports, over 40 hours of travel and two nights in a plane. Even in J, I would not wish it. Best choice might be spending a day in AMS. Could be worse.