There are a number of people who thought that having a KDE office suite was a good idea, they worked on it, KDE gladly welcomed them into the project and provid

There are a number of people who thought that having a KDE office suite was a good idea, they worked on it, KDE gladly welcomed them into the project and provided infrastructure & announcements. Those same people might have not worked on the bits that you value yourself even if they were forced off of KOffice (now Calligra). They likely contributed a number of bugfixes and expanded use cases for KDE libraries along the way. KDE still has a well-defined desktop environment project, you just can't force people into it that have a different agenda to begin with.