OK - Thanks for that detailed reply, that does make sense.

One thing I don't get though is why is 'the Google organic search ranking for Steemit posts way higher by default'? I don't understand why that would be the case?

On the 'lack of total control' thing - I really need to be able to update my posts year on year with my other blog - it's educational, and just for user functionality I need to be able to add in links to contemporary news items.

Steemit has its uses though, I think for personal posts, just not professional use for me! But hey, for monetizing 'myself' it's the best option for sure.