Those arguments were made during witness testimony. That and the fact that of the 254 Texas counties about 80 of them do not have a DPS office.
Colorlines 3/13/12 DOJ Texas Voter ID Ruling Is No Surprise Given State’s Faulty ‘Colorblind’ Policies (snip)
Texas has no driver’s license offices in almost a third of the state’s counties. Meanwhile, close to 15 percent of Hispanic Texans living in counties without driver’s license offices don’t have ID. A little less than a quarter of driver’s license offices have extended hours, which would make it tough for many working voters to find a place and time to acquire the IDs. Despite this, the Texas legislature struck an amendment that would have reimbursed low-income voters for travel expenses when going to apply for a voter ID, and killed another that would have required offices to remain open until 7:00 p.m. or later on just one weekday, and four or more hours at least two weekends.