Because they believe in the future, despite all the problems facing the State of Israel, and have not succumbed to the nihilism and self-centeredness of general Western culture at this point in time.
Israelis are always close to death by terror/war/traffic accidents. They still live in the shadow of WWII.
Jewish values dictate that one should marry and raise a family whether you are religious or secular. That means it is, in essence a “Conservative” society believing in the sanctity of marriage and having kids.
While the Western young couples invest thousands of Dollars on Pet clothes, food and pampering, Israelis invest in their kids. They now have a lot of dogs there too but the main emphasis is still on God, life, family, country, defense, promise and hope.