What’s the purpose of uncapping budgets to fully capture AI’s benefits?

Google’s AI only works in newly created campaigns with budgets of at least $1,000 per day.
Campaigns that incorporate Google’s AI spend more of their budget to reach more customers.
When a campaign’s budget is limited, a Smart Bidding strategy will convert back to manual bidding.
Campaigns need enough flexibility in the budget to allow Google’s AI to work to its fullest potential.

The correct answer is:

Campaigns need enough flexibility in the budget to allow Google’s AI to work to its fullest potential.