When they say they want to dismantle gender roles, they only mean the gender roles that they perceive as disadvantageous for them. They still want men to perform the gender roles that are disadvantageous for men.
Taking the risk of making the first move is just one example. They don't want that responsibility, they just want guys who aren't attractive to them to stop trying to make a first move. Might as well rephrase it as "Just give up, loser. No one will ever love you" because that's basically the sentiment that's hiding behind "stop approaching women," especially when it's followed up with something like "why won't men notice me?"