The YongYea video about the article talks about Mother Base development "becoming really important in later stages of the game due to special events that need to be dealt with". He also got stuck in certain missions because he hadn't unlocked the proper gear, due to underestimating how much the game expected him to be doing Mother Base stuff.
of course mother base is not optional, but they've also emphasized that you can be pretty hands-off about the whole process too. you capture soldiers/pows and you can just let the game decide where to put them and what to research. i don't think it's a very big deal tbh. as long as you bother to capture enough staff, you're fine.