It is not an SVG!
It is a band-width problem, in this case. I needed about 10 minutes
real-time to download this image at full-size to my computer, but can work
anyway in parallel.
Vector-grafics should have been FAR MORE compressibale then jpeg or other
snapshots from random/real-word scenery! Thus, an irreal example.
I know, but the point stands. Who would want it embedded full size in
their browser?
The problem with that image is not (only) the bandwidth needed to
download, that could be overcomed by waiting longer. The browser can
freeze simply from trying to load it all into memory. Not so long ago
desktop computers wouldn't even fully hold it into memory (and it's
probably still the case on some less computer-developed countries).
Plus, vector graphics compress *much better* than raster, but they are
*much slower* presenting them. Try filling a web page of svg flags, and
see how much it takes to load. Or compare times showing times for raster
and vectorial.