I think that is a little misleading. The cost to rent the wedding pavilion is $3000, but that is obviously not the average cost of a Disney fairy tale wedding. What type of wedding are you looking for?
If you do an Escape Collection event (18 guests or fewer) you can get an entire package wedding at the Pavilion for $5,750 instead of paying the $3,000 venue fee as part of a $10,000$12,000 overall minimum for a Wishes event. Characters would still cost extra, though.