You mean creating a HTML/CSS website is easy in general. Because you can also develop games on the web and create whatever complex kind of application you can think of. Best to be precise when saying these things.

No spark and k8s are configuration problems. Hard but you are not creating the tool, just configuring it. It's more of a dev ops /sys admin thing and, though I agree it's very hard, it's a very left field comparison IMO.

With engine creation you are creating the tool. It's programming through and through.

Though I can see how a lot of backend people are taking on the role of "configuring" stuff so it's hard to delineate backend programming away from it completely.

Still even when taking this into account, it is of my opinion that a rendering engine is significantly harder then even K8s or spark.

You are right though that with existing game engines graphics programmers are not as needed anymore.

You get all of that in gamedev as well.

I've done both. Graphics programming is significantly harder. It's both harder to program for and harder to learn. Make no mistake, they are different, but in terms of challenge, Web is trivial compared to it.

You'll get a lot more people in Highschool who know Web simply because of how accessible and easy it is and a lot less people in Highschool who know how to create a physically correct rendering engine or a realtime graphics engine. It is brutally harder.

lol