I would disagree with that too.
How do you shut down a system that has open positions you can't get out of because of some unforeseen event ? What about if the market circuit breakers kick in and you can't get out ?
I only trade most liquid and non manipulated markets
I know lots of people dream about automated systems but I think that the use of discretion, understanding the instruments you trade intimately and understanding what the drivers behind price moves (or non moves) are, then you will make much more money.
The problem is, most people think that learning this stuff is beyond them. For sure, you have to research and dig around, especially if you want to be rewarded from some of the more esoteric drivers of price move BUT this approach is going to make you money way faster than following the normal pure TA approach that a lot of people go for.
My prediction is that after a lot of time investment in automated systems, you'll give up and either give up on trading or eventually discover that price is not driven by technicals.
I don't trade on technicals, only on price quoted in liquid marketss