In financial trading, you see plenty of videos on how to make money, but you never see anyone sharing all the trades he places, why he places, how he decides his trades, etc. That's common sense. Twitter is full of attention seekers who go through short term success. One of the rare guys I trust is Steve from Daily25 but he does not share his tips, he shares his journey and his vision of sports betting (he is a real professional, I recommend to follow his blog).
You got a good point there.
For new to sportsbetting, gambling, or trading, better master the most basic strategies and then customize it as to where you are comfortable with and where you are profitable.
To add to this , sports betting is quite simple if not the simplest of all gambling so you can learn and practice new strategies almost everyday with loads of games around the world and keeping to the basics and i agree you can be successful as a beginner with time.