You start with the easy case then gradually make the model more robust by increasing the difficulty. What you’re suggesting is akin to trying to develop a jetl

You start with the easy case then gradually make the model more robust by increasing the difficulty. What you’re suggesting is akin to trying to develop a jetliner before building propeller aircraft. Too hard too soon and you don’t really know what the target even is. Much learning happens before you can successfully execute a complex plan like that. Plus it’s better from a business standpoint because you can achieve probability profitability sooner with your MVP.