The circuit will:
It relies entirely on ambient static charge, making it highly unpredictable depending on your footwear, the flooring, and humidity.
Can ​turn on or off randomly just by waving your hand near it.
​Pick up ambient 50Hz/60Hz mains hum from the air and oscillate rapidly.
​Easily get destroyed by Electrostatic Discharge (ESD) from your finger, punching a hole straight through the microscopic oxide layer of the gate.
​If your finger doesn’t deliver a clean, decisive voltage to fully saturate the gate (ideally > 10\text{V} for a standard-threshold MOSFET like the IRFZ44N), the MOSFET will enter its linear (ohmic) region.
Instead of acting like a sharp switch, it acts like a resistor. It will start dropping voltage across itself while conducting current to the lamp, causing the MOSFET to generate massive amounts of heat and potentially burn out rapidly—especially with a beefy automotive bulb

When you touch it either does not work, works or fries the MOSFET. Just matter of luck, weather and what you wear.

Tomi Engdahl it’s not matter of luck. You can try it.

Circuit Stories I have built this circuit idea. It somewhat works, but I would not call it reliable. I have also experience how easily touching MOSFET with finger can fry it, so this type of design is just a disaster waiting to happen sooner or later.
IRFZ44 requires a gate-source voltage between 10 V and 12 V for best performance. Maximum Gate Voltage: ± 20 V. Applying a voltage higher than this will permanently destroy the gate oxide layer, damaging the device. Human fingers can easily carry thousands of volts of static electricity (Electrostatic Discharge).