Host broadcaster Channel Nine has opted to not utilise the thermal imaging technology, which is used to determine if a batsman has edged the ball.
Strauss, who captained England between 2009 and 2012, believes that the decision to drop Hot Spot is the correct one.
"Hot Spot just creates confusion," Strauss told BBC Radio 5 live.
"Sometimes it shows up, sometimes it doesn't, so no-one really trusts it. Hot Spot is not 100% conclusive.
"If you're going to use technology, you want to make sure that it's giving you a definitive answer, one way or the other."
Strauss led England to victory in the last Ashes series on Australian soil in 2010-11.