Practicing your writing skills improves the quality of your work.
Professionals in any endeavor spend time honing their skills.
Of course bloggers should set aside time for networking but writing is paramount. A1 stuff.
The more you focus on posting good, quality content the more you CAN post good quality content. So, if you aim to write quality posts frequently you will increase the quantity of posts you can write, by developing strong writing habits.
I toss in videos too - finger break time but usually publish 5 posts daily. 2-3 500 word posts for my blog and I also churn out 1-2 paid posts for clients.
I practice writing. A ton.
This simple fact is lost on the legions of bloggers who pass on the erroneous information that posting frequently decreases post quality.
If you practice a skill you will improve.
And yeah, for the burnout crowd...you will have to write a ton until that sets in....worry about crossing that bridge after you write for 4 to 6 to 10 hours daily