[candybar]

One very easy way to disprove this is by looking at the experience of startup employees after acquisition. Now the product is no longer offered by a startup, but by a big company. Do things get easier now that they are at established companies? Do you now have clear requirements?

Of course not - in many cases, things get drastically more difficult. Instead of being able to pursue a clear vision, you often have to deal with tons of inter-organizational politics. You have all these extra stakeholders that are trying to influence you, some with good intent, others not so much. More processes need to be imposed, there's more pressure for standardization/integration both in terms of the product features, implementation, not to mention processes.

And this is about apples to apples it gets.

Another way to think about this is that there's a reason why startups are successful despite the massive advantages incumbents and larger companies enjoy. It's because certain things are harder at bigger companies. Then how could it be that being at a startup is uniformly harder? Startups exist in large part because they are more efficient or make things easier. If you flip that around, it means trying to do some of those same things at a big established company can be objectively harder.