I think that gambling is not a good way for a stable earning, only if you do not become the owner of gambling sites, because there is no strategy, there you can rely only on luck.
You think i gamble in sport 99% of my bets, other 1 represent e-sport cuz i watch them from time to time (have cable tc chanell with this).
Here is something that can make you think otherwise. When i bet on safe i try to find 1-2 games on two different sport betting sites. Then I use this method that works,
Will use for example sportsbet and nitrosport (not net to bee either of them)
1 match for both sides with quote on goals over 2.05
sportsbet: under 2.5 goals bet quote 2.05
nitrosport: over 2.5 goals bet 2.05
This system works excellent you pick one match for both betting sites but find match with goals easy to win for sure, picking winners is very risky, goals are safe.
This system serves me for quite some time only bad side is to find a match for this sometimes it takes several hours.