You cannot do well without a strategy and you cannot do well too when you keep changing strategies over and over again.
What makes you even better than a machine is the fact that you can think, you can fine tune your strategy with experience you keep gaining over time, but when it comes to never letting your emotions come before your strategy, you need to be like a trading machine.
Emotions are surely obstacles on the way to successful trading. One shouldn't be sad because of losses or happy because of wins. It will cloud the judgement. But your post overall still sounds like a trading bot is a good idea. It cannot improve the strategy, but at the same time a human being can't really be emotionless. And IMO humans trade better than bots in general, so it's not that obvious. One has to be passionate about trading itself, feel motivated to perform better in general. Even with a great strategy, motivation and no sudden emotions, I guess trading is just not for everyone. Most of people will lose, only some will manage to make it a source of income.