The best revision for the claim as a rebuttal to the counterclaim would integrate evidence and address the concerns raised in the counterclaim while strengthening the original assertion that lowering the voting age could lead to increased civic engagement.
Here’s a possible revision combining those elements:
"Lowering the voting age from 18 to 16 can foster lifelong voting habits among young individuals, as evidenced by countries like Austria, where the shift led to increased political engagement among younger voters. Despite current low turnout among the 18 to 29 age group, incorporating 16-year-olds into the voting process allows them to engage with civic education and issues while still in high school, increasing the likelihood that they will develop a habitual voting practice. Given that 16- and 17-year-olds can work and pay taxes, they deserve a voice in the democratic process, which could ultimately lead to higher voter participation rates in their future."
This revision directly counters the claim that lowering the voting age won't impact voting habits by providing examples and emphasizing the potential benefits of early engagement.