You can use it to log into bank account pages, file taxes, book appointments with dentists, place orders in (private) pharmacies, check your electricity company account and many more. Any reasonably serious company could request integration.
There has to be some other reason, unless it's to encourage fraud?
The type of in-person voter fraud that can be identified by an ID is very low, and trying to change an election this way would be very expensive. More people have gone to trial because while they were legally entitled to vote they were unable to get appropriate ID.
Other types of voting fraud, like registering in and voting in multiple districts, is much more common.
The people who for decades fought against requiring ID for so many things said it was a slippery slope. Now you are on the slope, thinking it flat.
Fraud of this sort is incredibly rare.
> Existing research and evidence shows that voter impersonation is extremely rare. Between 2000 and 2014, there were only 31 documented instances of voter impersonation.[3][4][5] There is no evidence that it has changed the result of any election. In April 2020, a voter fraud study covering 20 years by the Massachusetts Institute of Technology found the level of mail-in ballot fraud "exceedingly rare" since it occurs only in "0.00006 percent" of individual votes nationally, and, in one state, "0.000004 percent — about five times less likely than getting hit by lightning in the United States." - https://en.wikipedia.org/wiki/Voter_impersonation_in_the_Uni...
Mail-in ballots don't require id, and still have a low rate of fraud.
We can easily find cases of people unable to vote because they did not have id and were unable to get id.
https://www.norden.org/sv/info-norden/rostratt-i-sverige
> För att kunna rösta ska du kunna styrka din identitet. Du styrker din identitet genom att visa upp en giltig id-handling eller genom att en annan person kan bekräfta din identitet. Då måste den som bekräftar din identitet kunna uppvisa id-handling och ange sitt personnummer.