you have a point, but saying that there is no truth without being able to prove it, and saying that there is truth without being able to prove it, supports the idea that no truth is a certain truth; that nothing can be known for sure.
I only recently found out exactly what nihilism is, and I find it a very compelling philosophy, but not because it gives me freedom. rather, because it fits with my world view. I didn't feel guilty for disagreeing with others before I knew what this was all about, I just accepted that they didn't think like me. I don't think it's a way to shirk guilt. more like the belief that guilt itself has no meaning, no grounds. why feel guilty for seeing things differently?
i don't even know if i am a nihilist, but i agree with a lot of what i've seen so far