In which one can additionally fit: a coffee shop, restaurants, light repair shops, tool libraries, and a bathroom for every person
A whole power rack would indeed be neat but also very excessive unless you have the space. A pair of dumbbells under the sofa will take you a long way. Running on a treadmill, no thanks, just go outdoors.
Why does your sentence start with but as if that’s a bad thing?
Well depends where you live, but in the Bay Area a house big enough for a home gym would be like $3 million and outside most people's budget.