At the robotics lab I work with it’s not uncommon for a piece of electronics to require a multi thousand dollar voltmeter, because they need to measure precisel

At the robotics lab I work with it’s not uncommon for a piece of electronics to require a multi thousand dollar voltmeter, because they need to measure precisely extremely small voltages. We have a bunch of these in our lab for example: https://www.tek.com/en/products/keithley/digital-multimeter/dmm6500-6-5-digit-multimeter https://www.tek.com/en/products/keithley/digital-multimeter/... Your series of comments in this thread frankly demonstrate a lack of understanding of what electrical engineering is. Yes if you want to make glowing LEDs then a multimeter and other cheap equipment are all you need, and you might be able to learn that in a month. But electrical engineering is so much deeper than that. Trouble comes when you have things like high power circuits right next to sensitive high speed signals. Eg a compact drone motherboard could be driving potentially hundreds of watts of switching currents right next to high speed camera sensor data streams. There’s countless examples of what can make electrical engineering hard. If you don’t understand, don’t argue with people online - listen to people with experience and seek to understand why without challenging what surprises you. It’s all very interesting if you want to learn it.