You can not bypass the thermocouple. Without it you would have to severly modify the gas/fuel valve/pump in order to make it operate properly.
How thermocouples work is by electrical voltages produced by heating the bulb at the end of the unit. This electrical charge is measured in millivolts (millionths of a volt) This small electrical charge operated an electromagnet that applies a minute amount of pressure on a valve that allows the pilot light to recieve fuel. It also allows the other valves in the main valve body to open up and supply fuel to the main burners.
If these keep failing on a regular basis you need to look for something that is frying the electric generator or the magnetic properties of the thermocouple. This can be something as simple as a speaker magnet set too close to the unit. It may also be a transient spike of electricity from something.
I once went to a friends parents home to repair their computer. They said that they had it repaired only a few days before by a factory repairman. But that was their last free service call. They were allowed three. After speaking with them they took me into the den to look at the computer. The lady ran a day care at her home, and there of course were finger paintings, and color crayola drawings posted everywhere.Especially dense was the compter caseing. There were magnets holding at least 50 or more little pieces of paper with miscellanious things on them. I asked her if they had always been there. "No," she said. "Only for the past couple weeks. The unit used to be in the desk". I removed all the magnets (these were good neodynium magnets. Nice and strong to keep all the paper attached), and then reloaded the opsys. She never had problems with it again that I know of.
. This is the type of thing you need to look for. Something that even a tech would be hard pressed to notice. A wire touching the metal of the unit, a speaker, or even the flame of the pilot up too high. Unless you are a very unlucky person there is an underlying reason for this unit to be blowing this many thermocouples.
Please post any other concerns you may have here.