Is histogram not a bar chart? As in, it's a transformation you do on the data (to get the frequency per bin) and then most commonly represent it as a bar chart. It seems to me like saying that line smoothing is a different graph type: it's a new look, but if it was previously a line chart, it's still a line chart except that the lines are drawn between different values. How do you see that?

I would also say there are more useful visualizations one can do than bar, line, and scatter. For example, though I'm not sure what it's called, there are charts that suit different orders of magnitude. They're like area charts (line chart with the area under the line filled in) but it wraps around from the bottom, when it would otherwise exceed the top, and shows that second layer in a different color. Think I mainly see them for like network traffic or latency graphs. I find them useful because you can see different scales without a lot of vertical space. (Don't know how well they work for color blind people, but then the same argument goes for any sight impairment and visualizations.) The underlying data points remain the same so I'd say it's actually a visualization change and not a change of the values being shown

Of course, most of the things people pick as more-pretty-looking alternatives to bar/line/scatter aren't good visualizations, so I agree with the sentiment. Just that there do seem to be more options that have benefits for certain datasets