For this same reason, despite having been very lucky that day, I never tried again. There was no stimulating factor that would lead me to try betting on that lottery again. So I assume the winnings don't constitute a large enough percentage of the stimulant to make someone become a gambler overnight.
I don't think this is a fact and just your own assumption, winnings motivate me to continue and so do all the gamblers I met, we have two goals why we are betting and these are to have fun and make money if there is an opportunity,
the main factor that activates your dopamine is being rewarded for something you did.
I think it must be an accumulation of stimulating factors that make certain types of bets seem attractive to us, based on our personal tastes.
Although winnings are not something you expect when you expect and this is one of the main goals, I have never seen a gambler who is not excited about his winnings It is the materialization of his desires, it's a motivating factor for him to continue.