As a currently unemployed developer I take this advice everyday but it really hasn't generated any results (and it really shouldn't be at my current experience

As a currently unemployed developer I take this advice everyday but it really hasn't generated any results (and it really shouldn't be at my current experience level). I've heard countless times from other developers that they would be happy to hire a competent programmer with no familiarity with their stack because it's better than waiting 6 months to find a dev with the preferred experience. I've never seen or heard about this in practice.