The opposite headline would have been more true. This ruling DOES disenfranchise those very same voters for state and local elections.
They won’t get to vote on little things like who draws the voting districts, who runs the elections, who certifies (or refuses to certify) the elections. Same for who decides on school book bans, policing priorities, medicaid expansion, or mask bans.
This may be a smaller loss than expected, but painting it as a win is disingenuous.