That's actually not true. For example, the Russian Soyuz is expected to still have lower cost per kg to LEO than the Falcon rockets from SpaceX. Fuel is the vast majority of the cost of a rocket launch.
That's completely wrong. Fuel is a tiny fraction of a rocket launch. At best, SpaceX's Falcon 9 costs $15 million to refurbish and re-launch (according to Musk). About $200,000 of that is fuel. That works out to 1.3% of costs which is far from "the vast majority."
$200,000 is the cost of the atoms in the fuel. Most of the rest of the $15 million is the cost to get those atoms to the right temperature and pressure when they are stored at a different temperature and pressure, transport those atoms, and put them in the shell. Not to mention the cost of cleaning and coating the fuel tanks to make sure that they are inert and won't react to the fuel (this has to be done on non-reusable rockets too).
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.
err, are you forgetting the cost to literally build a rocket? Or are you arguing somehow that fuel costs more than building the first stage of a rocket?
The idea somehow that Soyuz is cheaper than Falcon-9 is laughable.
You can buy the atoms from Sigma Aldrich or any other chemical supplier. You have to buy a lot of atoms, and you have to buy them by the liter.
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.
Rather than digging in after your initial mistake, it'd be better to google it. This is a no-stakes random internet argument, so you've gotten the lesson cheap; but if you repeat the same mistake elsewhere you could do yourself a lot of harm.
