In this case they sacrificed a feeling of professionalism. Helvetica is "serious" and used by real publications. Kermit would probably not be used by a major

In this case they sacrificed a feeling of professionalism. Helvetica is "serious" and used by real publications. Kermit would probably not be used by a major publication (like NYT or WaPo) because people wouldn't take them seriously even if it's easier to read.