Years ago on a widebody, just after a hangar visit, as we went through 10 degrees nose up on rotation, the stick shaker went off (due to a faulty/stuck AOA gauge).There were other issues as well but I can tell you the stick shaker is VERY distracting.It went off continuously until short final.How any pilot can decide to continue with a commercial flight like this is hard to understand.There is no need to be told "land ASAP etc" it is kind of obvious.This Boeing model did not have MCAS but once the AP was engaged a similar safety system activated, which thought we were stalling (due to false AOA ) and at quite high speed (280k) started to violently "pump" the elevator to try to control pitch above stall (alpha floor protection).This was a very confusing and scary experience and took the 3 guys in the FD by surprise.The FD experience was around 80 years that day.The upshot is that it starts to border on criminal negligence to keep flying un-airworthy airplanes with these kind of problems that are ALREADY known about.Something is very very wrong with a safety culture that doesnt stop this kind of thing.