They say that you have to be very efficient (lean) and launch a product whenever it brings a minimal user value. Except that nowadays users expect every text field behave like Slack. Except that if your visual design is subpar then it will look poor on users’ phones. Except that users expect for every piece of software to be synced in real-time, run on every platform, have integrations with the biggest players etc etc etc.
See, all of these things became a commodity. That’s one of the reasons Amazon can have poor UI in their app — it doesn’t matter as long as their delivery times and return policy are unbeatable.