The early days of aviation weren’t for the common man, either. The first air-mail pilots flew over a majority of countrymen who didn’t have electricity or indoor plumbing. Today we can ride in a cattle car with wings and go to a remote destination for less than the IRS mileage rate ($0.57/mile), assuming it’s even possible to drive there.
In my career, I’ve ridden charter aircraft, both fixed and rotary wing, to remote job sites - I expect something similar will be the first practical use of commercial spaceflight (I’m not counting trips to the orbital 7-11). There still remains the one discovery that will make the commercialization of space a “must” - something that satisfies a human desire similar to the 500 billion dollars spent globally on cosmetics every year. Something that can only be made or obtained in space. When that discovery is made, the gold rush begins.
One other aspect is Elon Musk’s desire to get a fragment of humanity away from Earth - he started out in software, and having backups is a good plan. The idea is nothing new, to quote one of my favorite science fiction authors:
“The dinosaurs became extinct because they didn’t have a space program. And if we become extinct because we don’t have a space program, it’ll serve us right!”
― Larry Niven