Well, to be fair, there are more than one aspect of football betting.
Some like to analyse the players, tactics, coaches' styles, etc.
Others prefer to concentrate on odds, spreads, movements, etc.
Yet others only believe in bookie influence and just focus on that.
To each his own, and it can be serious if it involves money, but important thing is to bet based on our own judgement and what we can afford to lose, i.e. treat is as entertainment and not money-making exercise. Otherwise sure to be disappointed quite often.
Btw, I don't even follow A,K,J, Ass leagues, let alone Thai league, since don't watch and not interested. English championship and serie A also not very interested.