Confusing direction in Turbotax Premier 2022 about reducing Federal taxes by contributing to an IRA and valid dates

Turbotax Premier 2022 indicates that I owe Federal taxes ($2,950).  It indicates that if I make a contribution to a traditional IRA, up to my limit ($7,000 for being 63 years, married, single income), then I can reduce my taxes. It also says that I can do so up until 4/18/2023.   So, I contributed to a traditional IRA the $7,000, entered in Turbotax, and reduces the taxes due to $1,356.  Nice.  But when I answer the question about:

"Tell us how much of the above total contribution for 2022 you contributed between January 1,2023 and April 18,2023", and I enter the $7,000, then it reverts back to a Tax due of $2,505.  A reduction of only $445.  Are these calculations correct?  If so, why would anyone put $7,000 of hard cash into an IRA (that will immediately lose money due to market conditions)  if it is only going to obtain a $445 reduction on the taxes due for 2022?  And then it refers that I should have a Year-End summary from my IRA institution or a Form 5498, which most likely will not reflect this contribution.  Am I missing something here?