So if I tell you that upgrading pretty much all databases is a piece of cake but not include the criteria "unless you want to keep your data" you would say that is a fair statement?

If you claim that process X is trivial one has to make some assumptions, right? Otherwise I could claim that going to the moon is trivial but leave out "assuming you have a rocket, resources, people and anything else you may require".

Claiming that something is a piece of cake as a broad statement without any details is meaningless at best.