What's respectable? It's relative. Some people might think it is worth it. He did not. Rockstar can't read every person's mind and offer them exactly what they feel would be respectable.
Someone else brought up the Super Bowl. This is a show seen by 100 million people, the biggest TV event of the year every year in the USA, where commercials cost like $7 million per 30 seconds, for a league that gets over $20 billion in revenue a year. The halftime show singer gets paid like $1000 to perform it, bare minimum union rate. These are big stars, too, who make a lot more money just doing a regular show, an appearance, or even an Instagram post. Yet somehow the NFL finds someone every year, because they decide that level of exposure is worth it. Ultimately it's an individual choice.
GTA6 is going to be played by a lot of people who would otherwise never have heard of this band or this ancient song. What is it worth it to reach that audience? Well, that's everyone's choice.