I've seen many research papers where all they disclose about the software is some pseudo code + some tables with timing results to prove their "performance gain

I've seen many research papers where all they disclose about the software is some pseudo code + some tables with timing results to prove their "performance gains". For those types of papers I agree with your statement. But in many academic scenarios others will want to inspect the source, and the quality of that code is certainly something that will add or subtract from your "status" in the academic world so to speak :-)