People are paid money to sow uncertainty about climate science. These tactics are the same ones used by tobacco companies. The tactics are the same and many of the scientists are the same.
That's not an honest debate.
The reason people don't engage with you has nothing to do with whether you're an expert or not. It's because people who deny climate change often grab a snippet of science, out of context, and that's been given a spin by deniers. Then, rather than learning why that bit is flawed or what the context is they'll just throw it into a discussion and demand that it is explained. And then they'll grab another bit. And another bit. Eventually it's easier to regard this as trolling (which it is - concern trolling) and treat appropriately (by stopping feeding the trolls).
I look at the tech world (which I know very well) and "experts" are wrong all the time. I can't imagine it being much different in other fields.
I see people here on HN making comments about the economy. Should all of these opinions be ignored because they aren't experts?
Look at the guy that discovered bacteria: The experts of his time shunned him and he died in an insane asylum.
Scientists pretty much lose their career overnight if they have any study or research on non man-made climate change.
How can we really have an honest debate when this kind of behavior is going on?