The odds in lotteries are very small that's why it has a very high jackpot amount, I doubt if it's possible to win a such jackpot in any online gambling site/ sports betting. Only a few people are lucky enough to hit a jackpot in lotteries and there are over thousands or even millions betting in lotteries.
You cannot compare online lotteries to offline lotteries the numbers are incomparable on offline lotteries there are only a few lotteries in one country or state or town, but in online casinos, there are numbers of online lotteries and they are competing with each other and people trust the physical lotteries than online lotteries because they are more regulated and you can easily get your winning because you can go to their office to claim as we do here in our country, compare to online casinos where they can ignore you and sometimes blames you for cheating.
To be very honest, i do not feel comfortable or trust the physical lotteries also. Among all the gambling games, I feel lotteries is the one which is mostly manipulated by the gambling industry. Also it is easy to gather money from gamblers from lotteries as most of the lotteries require less capital and give high returns.
Due to this, gamblers tend to take the risk and hope they could win a big jackpot by investing very little capital amount.