A trademark, like Guns N' Roses, exerces a social function. This is a very known concept in the marketing business. So, the impact of the trademark decisions is transfered to the public's perception of it. This could generate a positive, or a negative image of them, which directly influences the success of the band. In example, let's say Metallica does a livestream about COVID-19, playing music, talking and being friendly. They'll be much more remembered than GNR, it'll make more headlines, and, thefefore, they'll sell more music/tickets.
Not doing anything is straight up bad management.