How does that help when some places have only one polling station for 100k people? And there is a global pandemic, so we don't want 100k people congregating in the same crowded space?
“Black voters, on average, wait 45 percent longer to vote than white voters; Latino voters wait 46 percent longer”
https://amp.theatlantic.com/amp/article/613408/
See also the particularly egregious Kentucky example where they even tried to close the station while people were still in line.
https://www.cbc.ca/news/world/us-primaries-kentucky-1.562334...
The examples of this kind of suppression are sadly countless here in the US.