Some members here may not care so much whether other members are interested in reading what they write or not. Some do care, though. If you care, you should try to make your writing readable, enjoyable, wonderful or interesting.
Some members may enjoy what is written with often-used or commonly used words while some may want to read what is written with unfamiliar words or even rarely used words.
Some members here are really good at remembering unfamiliar or hard-to-learn words. Many my find it hopeless to memorize those hard words. You may find that you just keep forgetting, no matter how hard you try to memorize them. So, it's hard for you to write something with so many hard words, even harder to use them correctly.
Only too often, though, you may not be able to write something which is grammatically correct. If so, what's the point of writing something with so many hard words.
You may risk reducing the readability of your writing if other members find it so hard to read something full of hard words. So, it may not be a good idea to use too many unfamiliar words in a blog.
Don't get me wrong - vocabulary really matters. Some members here find it bored to read something written with commonly used words, even though they are perfectly written.
Try to write something that is writen with both familiar or unfamiliar words - using those words which is unfamilar but not too hard.