yeah...you said it. tragic....or better said, such a huge, missed opportunity.
not sure if the folks on here know anything about TBM technology.
while the Tunnel Boring Machines were in the ground, it would have actually
cost nothing (incrementally) to have built the tunnels out to fisherman's wharf.
Later, as with the three current stations, they could have then cut into the tunnel
and built the north beach and fisherman's wharf stations. Personally, i don't think
the subway makes sense only going as far as chinatown.
just wait till the folks in chinatown learn that the platform is close to 9 stories underground. yet, if it were built out to fisherman's wharf and north beach, the trek
through the mazes to get to the platforms would have been worthwhile.
source: SFMTA website