It actually it is (mostly) as easy as it can be if you think about how the web lets one run third part code safely, not only as a sandboxed in the host environment but also from different domains. I've seen this space evolve since the days of DHTML and the best way to create dynamic content is with document.createElement. Actually I use the crelt[1] util, and the code is shorter and faster then any React/Vue virtual-dom templating system. It like finally riding a bicycle a without training wheels after 15 years of practice.

[1] https://github.com/marijnh/crelt

If you push down the front of the learning curve, the back gets steeper.

That depends on how much of the front of the current learning curve is composed of things people will need to know later.

A person can be a successful programmer for decades and do millions of HTTP operations without knowing the distinction between TCP and IP.