The Chair To Keyboard Interface, aka the CKI, is the most essential component in the setup and use of your computer system.
A corrupt, or improperly tuned, CKI can cause disasters.
Fortunately, a CKI fault (aka PEBCAK) will not cause deadly results, as you might get with a similar fault while driving your car, for instance.
Computer systems are designed to be fault tolerant, in this regard.
That does not, however, mean that you should freely operate your computer while heavily under the influence of various factors: