There are examples of that working and there are examples of shorter heights working equally well. I enjoy them both (Manhattan and Paris as examples of the two types) but what SF is doing doesn't really work for me. All the high rise residences are being built in a small area south of Market, but in the same neighborhoods there's nothing to do, nothing to eat, no public spaces. It's not very livable.
I can't agree, there are lots of restaurants in SOMA as well as the city's best nightlife IMO.
Nightlife I'll grant you. But I bet if you moved into the new apartments on Beale and Folsom you'd take an Uber everywhere, because there's nowhere to eat lunch on a Saturday within half a mile, and the nightlife is 1.5+ miles away.
That part in the middle of South Beach is a weird little restaurant desert. However if you are willing to make the 10 minute walk I'd recommend the Delancey Street Restaurant for a nice place for brunch with a good social mission. I had many a mimosa there when living in the corporate housing across the street.
High-rise buildings really aren't necessary for a walkable lifestyle. 5-6 stories (Berlin style) and everything you need is within a couple of blocks. Even with UK style terraced streets usually mean you have shops/cafes/pubs within easy walking distance.