I takes me about 40 hours to do proper DD on a company. It depends if I know the sector well, if not then even more. The actual trade is just hitting the sell/buy button.
That's once in a month.
I don't think I could ever automate the DD process.
You can come up with good AI and amazing algos but at the end of the day, a doctor knows more about the ill person just by looking at him/her for a few seconds, I feel like it's the same with trading/investing.
If I automate the valuation, I lose the connection to a company and its numbers. Another example would be insider transactions, there is a difference how you evaluate insider trading, it depends on the company and its market cap, the sector, and the management.
I don't even know how I could ever come up with good indicators for those issues.
Now there are also people who use TA, that's your clientele.