Is there any value for Russians in completely eliminating the Ukrainian resistance at Azovstal, Mariupol?

In Mariupol, the Russian troops have completely levelled the city and just leave a small pocket of Ukrainian resistance at Azovstal.

Since Russians have completely encircled the steel mill and the fighters holed up in the place can't go in and out at will, there isn't much that the fighters at Azovstal can do to disrupt the Russia's goal there (ie: they can't stop Russians from "liberating" the rest of the Ukraine). So is there any point -- besides symbolic ones-- in storming the steel mill and completely routing the fighters there?