Yes it is possible. I do it myself. Why would it be a hoax? Generally those who don’t believe in it are those who are uneducated about it & misunderstand how it works. They base their opinions on the very little knowledge they have about it. And they can’t seem to get past the idea that there is more to life than what your human eyes can see & what our current scientific technology can detect.
Everyone has unconscious projections every night when they sleep. Astral projection is simply the skill of turning them into conscious projections. Anyone can learn how to do it themselves if they put enough effort into it. The differences in opinions doesn’t change the fact that it is real & people have been doing it for thousands of years. It is a normal natural thing anyone can do.