Few here (not all) realize how sportsbooks are run, so please let me inform you of just a couple of things:

The only bets Vegas really juices on people (stupid or entertainment bettors) are parlays, teasers and certain props. You could throw futures into this as notoriously bad re:expected return/a certain type of prop.

There's already too much competition for them to change the industry standard of -110, and many offshores already beat them big in this way, but Vegas has a convenience or no-hassle (catch-all term) advantage on them that allows for this. What's going to be very interesting is how much the sportsbooks change when SCOTUS decisions comes out.

As a slight aside, in 2017 did you know that sports betting revenues were 1/12 of slot revenues in the state of Nevada? 248 million vs 3.1 billion.