It takes about two hours to fly from Kuala Lumpur to Siem Reap. Why not one hour or 30 mins? Why are we not writing to AirBus and give a feedback to make the plane fly faster?
Understanding how a plane works is no easy task (at least to me), let alone building one.
Similarly, when creating an online system, do not expect your users to suggest ‘major changes’. The average users can give feedback on their experience but to get them to tell you why you should start implementing full-text indexing for your database is probably way too far-fetch for them.