Computer skills are a survival skill in that they help ensure you are employable. While it's true there are still jobs where these skills are less important, having these skills will help ensure you are qualified for a wider range of jobs and, when you are employed, are able to qualify for promotion (e.g., moving from skilled labour to management).

I honestly would not want to find myself unemployed in a tough market without these skills. Both finding potential work and qualifying for it would certainly be more difficult.
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Victory awaits him who has everything in order — luck, people call it. Defeat is certain for him who has neglected to take the necessary precautions in time; this is called bad luck. Roald Amundsen