All lighting that you have control over is technically articificial. All lighting, fundamentally, operates via the same mechanism: emission of photons. Spectrum matters, yes, but this only matters, IMO, at certain times. Blue light at the wrong times is almost certainly bad. I also suspect the same for red, but can't provide evidence for that.

All of these articles I've seen you link to are just flat put wrong about one thing or another. There are flicker free LED lighting solutions. How do I know? I've designed a basic current-limiting circuit when I was dabbling in building my own desk lamp with atypical photography grade LED chips. The output of the circuit was exceptionally steady and to all ways that I could measure.

Any LED light that flickers at the mains frequency is just doing the same thing as an incandescent bulb. The thermal inertia provided by the usually tungsten alloy element tends to smooth this out, the EXACT same way as a capacitor in an LED driver circuit. Since the components of an LED have less emmisive inertia, the change in current supplied to them and the dropoff in light output is much fasters than a hot wire of tungsten in a nearly perfect insulating environment.

Now, I DO have issues with some LED drivers. There are some really awful repurposed circuits that are emitting a heck of a lot of junk EMF. This IS NOT an issue with the LED itself. If you want to specify that spurious emissions well outside the visible light spectrum are an issue, I'm inclined to agree based on a very wide variety of anecdotal evidence and some more rigorous study into that particular matter.

LED lighting is much more complex than burning stuff or heating up a wire. It has many advantages over other lighting sources,especially with regards to light vs. heat output. Junk drivers are awful visually and possibly harmful other ways, but that's the same for nearly any junk switch mode power supply. Filtering out the exaggerated blue spectrum from LEDs is also an active area of R&D and it will continue to get better.

Mostly, I just think your understanding is limited, your interactions are very biased, and you seem extraordinarily closed off to basic facts. I do wish you'd look at things from a broader perspective. It's usually myopic to completely dismiss new technology as outright bad. It's also hypocritical to even have this argument since unless you have an old school CRT monitor to display all of this, you are still using LEDs to interact with the world. If LEDs are THAT bad for you, then I politely suggest you just stop using the internet altogether. Oh! But that would dampen your ability to interact and generate sales. Heh. Just something else to think about.