> If I have two candidates and the only signals are (resume, portfolio), then I will select the highest signal. I am sorry, but I can't in conscience decide to take someone without proven work over someone with proven work without other information.

On the upside, the person with a code portfolio and less other hobbies is also more likely to be winning to commit more of their time to work, stay later, do "hackathons." It's a win-win for the employer! /s