Everything strategy for trading have advantages and disadvantages. Your job as a trader is to use the most advantageous strategy at you disposal or combine different positive side of each strategy. Botting could be good or bad, manual could be slow and steady!
In most cases, manual seems to just be the best way to handle trades. I am not saying using bots cannot be promising at times, but when it comes to bots, there is always a season for it and if you still do not try to keep some lookout into the market, to know when to get your bots activated or not, you might get yourself screwed.
Like you said, what is most important is to have a good strategy and then know how to execute them, and if you have a pretty good one, bots will always help you execute them well without emotions or discretion, but you still need not get too relaxed.