Define "need". Do you need to breathe? Only if you think you need to live, and the only reason you want to live is that you are wired that way (selection bias, all those who didn't care enough have been removed). Life isn't something objective, you can just decide on what's important to you, as long as it doesn't interfere with your ability to go on living it does not matter. Some people like cats, some people like ice cream. Some people like to talk to other people in their field in person and go to conferences or far-away meetings. Some people go far away for no reason at all (vacation)!