You have a point. Sure, embedded problems can be very tricky and difficult -- much more so than web stuff. But most embedded folks don't solve problems of THAT complexity in their day jobs, just as most web programmers aren't implementing Machine Learning code during their day jobs. The embedded problems you're discussing are usually tackled by the elite, or by highly specialized Linux kernel types -- and no, I'm not elite. Many employed embedded people, believe it or not, have never worked with DMA.
And as someone who made the switch from embedded to web,I find web much easier in 90% of the time.
Sure its hard to learn CSS, but I want to see you learn how to handle Linux's buffer-heads or program a custom dma chip.