Very, very flawed reasoning here. It's basically arguing that YAGNI as a principle is exactly backwards: you're definitely going to need all this stuff eventual

Very, very flawed reasoning here. It's basically arguing that YAGNI as a principle is exactly backwards: you're definitely going to need all this stuff eventually so embrace maximum complexity from day 1. Terrible, terrible strategy. The only ETL framework you need is a general-purpose programming language. Cf. that article "You can't buy integration" from the other day.