Queensland's Deputy Premier Jarrod Bleijie visited Rockhampton's Fitzroy River on Sunday to reinforce the government's unwavering support for the 2032 Olympics venue.
Critics have expressed concerns tidal currents, uneven water depths and the river's snaking path could impede fair competition.
The waterway's estimated 500 resident crocodiles also perturbed some would-be visitors.
"The government's vision for this will eventuate," Mr Bleijie told reporters as the river hosted a statewide schools regatta.
"Let's be blunt, there were lots of people in a campaign against rowing on the Fitzroy saying that it was not fair … that has all proven to be absolute rubbish."
On Friday, Paddle Worldwide and World Rowing approved the site for competition after a technical assessment.
The evaluation - the full details of which have not been publicly released - reportedly took into account Rockhampton's winds and flooding rains.
Queensland now must deliver the "superficial" elements for the course, such as the locations of the finishing tower and start line, Mr Bleijie said.
"But that's easy," he said.
The government has also faced pressure from local bodies that fear the event is too far from Brisbane and risks leaving no legacy.
QRowunion chairman Gary Merritt organised an open letter to the state government, signed by 542 rowers, requesting rowing be held in southeast Queensland.
The event could otherwise be sent to Sydney if it was flooded out, he previously told AAP.
Mr Merritt said on Friday he did not believe the venue was locked in as the independent Games authority had yet to finalise a project validation report on the site's design, value for money and legacy.
The report is expected to be sent to the state and federal governments for approval.
But local state MP Glen Kelly said on Sunday the event would be invaluable to the region and rural youth.
He backed Rockhampton's ability to host thousands of visitors while defending the almost 500km-long Fitzroy River as a chosen venue.
"I've been around this patch all my life ... this is the best bathtub in Australia," Mr Kelly said.
There is no record of any fatal encounters between humans and the river's saltwater crocodiles.
But the Queensland Schools Regatta, which drew about 700 competitors to the river at the weekend, factored the reptiles into its safety management plan.
Sightings are signalled with a "crocodile, crocodile, crocodile" call and contingencies include suspending racing and competitors returning to the bank.
