Completely true, until you need a feature that the less powerful format does not support. Then you are back at the beginning, regretting spending all that time learning something that won't fill your needs.
ReStructuredText is not hard. Yes, unusual features are hard to memorize, but a quick google search beats it being impossible every time.
Though this could be said for literally anything you learn how to do. I spend my time learning the tools that will give me the biggest impact most of the time, and use the easiest tools for most other things, simply dealing with their deficiencies.
ReStructuredText is not hard. Yes, unusual features are hard to memorize, but a quick google search beats it being impossible every time.