I understand this fear. But there always will be different types of users:
-klickibuntis, they don´t have time and/or knowledge to build own content, so they get free and commercial packs, put them together and press render. More like virtual photography. If its done well, why not? If they have fun doing so, then its okay, even if the results might not be pleasing to most other people. Some do really great pictures this way. The only thing i don´t like about that is, if people claim they do it all on their own
- dedicated hobby users. They do must stuff themselves and sometimes add free and commercial content. Thats also great. Sometimes they refine those models they get - even better. Sometimes they use such packs to study and learn - perfect
-professionals, they do whatever to get the job done in time and in budget. This often means that they use presets.
I don´t think that the Terragen community will ever get a pure "klickibunti" community. It will be a mixture and I hope it will be a healthy mixture. And I always plan to distribute a mixture of objects, both free and commercial - and I hope that people like both ;-)
Sorry if my answer before was to harsh!