You don't have to guess at about anything, all you need to do is take a good look at and study the games' past draws, ask yourself "What are the "Natural" odds of this and or of that happening and of those things happening so often or as often as they happen ?", many people just don't seem to know much at all about patterns, no wonder that they can't predict right anything, at least not often enough.
But since perhaps none of us has a lottery draws machine, we have no "Base-Line" readings with which to compare, with states' lottery draws, the unusual appears to be the "Norm".
Anyhow, Why cry?, if we don't like it, we then should just not play.
Might perhaps be best to assume the worst (Just in case) and look for "Loop-Holes" and or "Safer" prediction techniques or methods.
Of course, in the above roulette case, it might be best to never again play at that particular casino.
As to lottery operators, they know only so much about prediction techniques if anything at all and also they have to "Deal" with a lot of bought picks or numbers, not just yours.
If anything, it might just be safer for them to "Pick" as winning numbers those that were bought the least, instead of trying to figure out how to "Screw" yours and others' prediction techniques.
After all, they do have and use computers and terminals with which they sell lottery numbers and also have one or more "Main" 'Home" computers and also do stop the sale of tickets with more than enough time before the "Supposed" draw(s) and let us not forget also about the so called "Pre-Draws".
Any-How as it might be or not, What does it matter? First of all, people are not going to stop playing, Second, just study the past draws of the particular game(s) and go from there.
For all that anybody really knows (And that is nothing, nothing at all) maybe none or few of the draws are "Fixed".
But just maybe.