It seems to be an unusual event for someone in their relative prime to switch careers. I also came from a job where errors were not an option. Before trading I had over 20 years of knowing how tired was too tired, what to do to prevent error creeping in, having multiple redundant computer systems and always having a reversal plan should one need to get out.
I got all that from fairly high end IT contracting. Only by pure fluke, getting an bad injury and while recuperating running into a couple of traders who said I had the right personality did I get into it.
The skills needed to succeed are not rare however switching tracks as a mature adult is an outlier occurrence I'm sure.
Pro finance from early days, certainly these guys and girls get rich but many seem to over complicate the task. Understanding of course there are regs to follow if trading OPM.