Why are men scared of moving in together? Do all girls have that issue?

So i have been dating for awhile and everytime we bring up the conversation of moving in together we gets a bit scared. He’s 24 soon to be 25 and for him it’s only acceptable leave his home and moving in with me once his 30 or so. He often brings up the example from his cousins that only left home and move in with their girlfriends at 33.
Do you guys do not look foward to have your independence and share a life with the love of your life?
Why are men scared of moving in together? Do all girls have that issue?
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