There are many reasons why listing is good business decision for the company.
Easier financing is one of the main advantages.
Since listed companies publish price sensitive information investors are more willing to invest in listed companies. That makes new financing easier, whether by new debt issue or by bank loan.
Circle of potential investors also spreads, since new retail and institutional (domestic and foreign) investors are available.
Trading is often intensified when share is listed in more transparent trading segment. Very often the price reacts positive also.
Since media coverage is increased image very often increases.