You were implying that Adam Smith's writings aren't relevant to today
I don't believe I made that implication at all. Relevant to late 1700s US? Not very much.
So, according to those criteria, quantum mechanics, psychology, neuroscience, and much of modern engineering is also pseudo-science?
psychology - yes. Neuroscience is still arguably in its infancy, and much of modern engineering is applied science. Quantum Mechanics is the one case I'd considered addressing previously, as it is the one obvious hard scientific field that we're still massively struggling to come to grips with.
There is actually much less disagreement about economics than you think. And the fact that people like you find it utterly confusing is no more a sign of a failure of economics than people seeing faces and pyramids on Mars is a sign of a failure of astronomy.
Who says its confusing? It's a fact you cannot predict the future, which most practitioners assert they can. IMNSHO, the best you can do is attempt to see trends, and much like the stock market, you'll be just as accurate. Where is the huge trickle-down economic enrichment? We've seen just the opposite. Where is the communistic ideal? Every communistic society is failing or has failed. Economics apparently has failed to provide the path to global enrichment everyone says they want. Or, looked at another way, everyone has gambled to be the top 1% in those scenarios at the cost of the rest. I'd just make the simple statement that the economic models and theories are universally flawed, as none have proven accurate in real life. Given the scope of the model necessary, I'd say that it will likely be beyond our capacity to model accurately until we no longer need to model it. And I'd still say there's significant disagreement within the field of economics, and that the laissez faire viewpoint would initially enrich a small segment of business owners at the cost of everyone else except the lowest classes in the world (an admittedly huge percentage) as wage and price equilibrium is reached. But this would only happen in a perfect world where every country has the same policy. The current free trade policies are a similar process, draining jobs and money out of the US, and it will continue for the foreseeable future. If congress had balls, they'd slap a general tax on all transactions, including at the border, to make up for the lost revenue but that's yet another conversation.