The solution here isn’t complicated: Extend paid leave to all new parents. When California established gender-neutral paid family leave, the number of fathers taking time to be with their infants doubled. Women’s earnings and employment go up when men take more leave.

Ms. Trump and administration officials are reportedly now considering a plan that also covers fathers and adoptive parents and changes the funding structure, though a more expansive benefit program is going to be a very tough sell to Republicans in Congress.

The child care plan that Ms. Trump put forward isn’t much better than her paid-leave idea. Her proposal to allow parents to fully deduct the cost of care up to a certain limit would apply to all parents, unlike maternity leave. But it would give the biggest benefit to those who need it least. Even though it includes a tax credit for families with the lowest incomes, the bulk of the policy is a tax deduction, which is worth much more to those who owe the most taxes.

According to analysis by the nonpartisan Tax Policy Center, families that make more than $100,000 a year would gobble up 70 percent of the total benefits. Those making less than $40,000, on the other hand, would get about a $20 boost to their incomes — not much compared with the thousands of dollars it can cost to put a child in day care. Yet poorer families spend a much larger share of their incomes on child care than those with more means.

These proposed child care tax credits, shortcomings and all, would cost the government $115 billion over the next decade.

Rather than offer a step toward something better later, Ms. Trump’s plan could stymie progress. If she were somehow able to persuade members of Congress to pass a pricey child care plan that does nothing to address the real concerns for most families, it would allow them to claim they already did something about the issue and ignore other, superior solutions. Worse, she risks giving them sticker shock without actually doing anything for families that aren’t wealthy. Conservatives are already calling her plan “mammoth.” If a real, comprehensive solution were to come down the road, would they have any appetite for it after this?

The climbing cost of child care has led to a 5 percent reduction in women’s employment in the United States in the past two decades. The lack of investment in child care is another reason other developed countries surpass this country on the percentage of women in the work force. No wonder, when far more women than men say they’ve had to take long chunks of time off from work to care for their families. Meanwhile, mothers with steady child care are twice as likely to stay in their jobs. If they were all able to get their kids into early childhood education programs, mothers’ employment would increase by 10 percent. A tax benefit for rich families won’t do it.

The politics of paid leave and child care have certainly shifted: They’re now bipartisan issues, at least among some lawmakers. But it is important not just that the country adopt these policies, but what kinds of policies it adopts. If Ms. Trump wants to champion working women, she needs to offer more than photo ops and empty promises.