It might be true that all religions are mysticism, but at least the Baptists only give you one layer of mysticism. The Witlesses give you two: Not only do they teach from a Bible that glorifies a value-destroying God, but the teachings aren't even true to the Bible! Besides, they do not shun you if you later disagree with a core teaching. You can still go to the Baptist church for fellowship and to contribute to the community at large without having to officially join the church.
If you are going to continue to go to any church, any mainstream Catholic or Protestant church would be a better choice than continuing with the Watchtower Society. At least they give you some freedom to think on your own, and they will not become enemies should you later decide to switch churches or disagree with a doctrine. And they will not keep changing the rules every other meeting. Not to mention that there are fewer meetings per week, no service, and the children have age-appropriate activities. Not that I would recommend it, but it is a free choice that you can do. In fact, it may make it easier to stay away from the Witlesses when you have somewhere else to go.