The space ship launch is a most tense moment. Should the launch vehicle fail, a precise rescue procedure is to be followed. The manned spacecraft instantly separates, flies to a safe distance and lands on parachutes.
The space ship landing is an equally important operation. If the automatic landing system fails, the astronaut (cosmonaut) can manually control the orientation system and start up the retrorocket engine. The standby retrorocket engine will ensure maximum reliability.
The parachute systems and the lander engines enable the re-entry module with the space crew to make a soft landing. Even if these engines fail the speed of descent will not exceed six meters per second in the most unfavorable downward air currents.
Of course, in this case the impact will be rather strong, but the astronaut (cosmonauts) will be sitting in closely fitting supports with shock absorbers. The descent module is suited both for landing and splashdown.
Spacecraft, like any other piece of equipment, may fail. As the systems become more sophisticated, which is the inevitable result of development, failures cannot be ruled out.