We don’t forcibly convert, we also actively convince people not to convert (I mean using every argument possible to convince people). Jewish Philosophy states that if someone is holy enough to go out of their way to join they’re holy enough to be Jewish (the conversion process is long and if it’s not sincere they aren’t accepted).
Jewish power structures have always been contained, in Israel for example Jewish religious leaders have little power.
Judaism has a long history of expulsions and being massacred, also forced conversations away from Judaism
Due to Jewish fundementalism its common to see people stop identifying as Jewish. For many people the Jewish community can be extremely hostile and unwelcoming, a few examples include: women, Neurodivergant people, Queer people, people without a Jewish education, people who dont fall into traditional gender roles/expressions, etc
As a Jewish person myself its for a few reasons:
Every Jew I’ve ever met is Reform. Most of them don’t even believe in God. But they take Judaism very seriously and is a core part of their identity.