"And this world was crueler than we have been led to believe. A letter has recently come to light describing how Monticello’s young black boys, “the small ones,” age 10, 11 or 12, were whipped to get them to work in Jefferson’s nail factory, whose profits paid the mansion’s grocery bills. This passage about children being lashed had been suppressed—deliberately deleted from the published record in the 1953 edition of Jefferson’s Farm Book, containing 500 pages of plantation papers. That edition of the Farm Book still serves as a standard reference for research into the way Monticello worked."
Since you needed someone else to say it.
https://www.smithsonianmag.com/history/the-dark-side-of-thomas-jefferson-35976004/
The following contains a quote of Jefferson's which ascribes his motives quite adequately, and this if from the family trying to make him look good.
“I consider a woman who brings a child every two years as more profitable than the best man of the farm,” Jefferson wrote in 1820. “What she produces is an addition to the capital,” while a male slave’s “labors disappear in mere consumption.”9 In 1819, worried by a spike in infant mortality at Poplar Forest, Jefferson believed that it was for “moral as well as interested considerations” that overseers should preserve slaves’ lives, not for “their labor, but their increase.”10 As Jefferson’s friend and neighbor John Hartwell Cocke observed, Virginia slaveowners increasing believed that their “profits consists in the increased number & value of their slaves,” rather than in the crops that their bondspeople produced.
If you read this entire segment, you'll easily see the family telling us (you) how opposed he was to everything he actually did. He hated selling slaves south because of their potential ill-treatment yet he did it just the same, he had his slaves beaten, but only as an example so he wouldn't have to beat them more. He constantly threatened to sell them south in order to assure their productivity. Jefferson was about the business of slavery which even the family that for decades denied his relationship (rapist) with Sally Hemings until DNA proved the lie.
https://www.monticello.org/thomas-jefferson/jefferson-slavery/the-business-of-slavery-at-monticello/
I've read the Federalist Papers and almost all the so called history of the period, I've also read the notes of the enslaved, and other materials not so supportive of what you would have me believe. I also compared the actions of the men to their words and almost all of them (John Jay would be an exception) came up lacking.
These are your apparent heroes who have testaments written about them by men like Betts who discarded what disrupted the narrative