I enjoy Joel Osteen's ministry and it was one of many influences which helped me a few years ago when I was at a low point spiritually. Joel Osteen's public speeches are neither Bible centred nor Christ centred, but is often inspirational and practical. Joel Osteen is not a Bible scholar, and perhaps not even a Bible student.
As for "milk" and "meat", I go to restaurants in order to develop relationships and friendships, both personal and professional - I don't really care what's on the menu since I don't really go to restaurants for nourishment. For nourishment, we do our own cooking at home.
Similarly I attend church for the fellowship, the music and the sabbath school (part of fellowship). I don't really care what the speaker has cooked up; I have all the ingredients at home, I have the Master-chef to guide me; I have lots and lots of recipes in my library written by His servants (both SdA and non-SdA), so again I prefer to eat my own cooking.