Also, "reusable" doesn't matter as much as "affordable" for rockets. I am waiting for one of the smaller companies with a dirt cheap rocket to eat SpaceX's lunch.
This is the typical sleight-of-hand that comes at Musk companies. The atoms in the fuel are cheap, but the process of turning those atoms into usable fuel is very expensive. This is the case for almost all rockets.
The Soyuz is partly cheap to launch because it doesn't need a lot of special fuel handling.
The idea somehow that Soyuz is cheaper than Falcon-9 is laughable.
Are you being obtuse on purpose? The atoms of the fuel, really? Where can I buy fuel by the atom?
If you want rocket fuel from those chemicals, you are going to have to pressurize them and cool them or warm them, and you need a lot of energy and equipment to do it. That is the expensive part. Often, rocket fuels are heavily pressurized orsupercooled, and supercooling a gas is expensive. That allows you to store more energy in a given volume.