> I live in Europe and I also ask "why can't we have that".
Which country are you in? Because the answer for "we" greatly depends on local environments and politics.
For Austria the answer for instance is "the alps" and urban sprawl. Trains stop everywhere and people want to keep this, there is just not enough distance to have high speed rails be effective and there is not enough space for dedicated lines. The answer is a very different one than for instance why Germany has so little.
Which country are you in? Because the answer for "we" greatly depends on local environments and politics.
For Austria the answer for instance is "the alps" and urban sprawl. Trains stop everywhere and people want to keep this, there is just not enough distance to have high speed rails be effective and there is not enough space for dedicated lines. The answer is a very different one than for instance why Germany has so little.