Because universally pop groups are often marketed as having strong bonds like bands/groups whose members formed the band for their love of music , but in reality 90% of the time they were put together by businessmen and just go along to push their individual image.
But I do agree with fans tho, for me the situation is kinda sad especially for successful groups that we know will never have the same relevance or charisma as solo artists (2ne1 comes to mind), but it’s better than a forced group anyway.