Don't just rely on statistical data because its not certain that Chelsea can win this match, its true that Chelsea chances are bigger, but look at Chelsea current development, which has experienced a lot of decline this season.
Meanwhile, Aston Villa is experiencing a lot of improvement so that they can enter the top 10 of the standings. I think this match will be quite difficult for Chelsea because now they have to be serious about winning the match so that they don't continue to be at the bottom of the standings. It helps Chelsea a little because they will be playing at home, and I hope Mauricio Pochettino can organize and improve the performance of his men and strengthen the teams defense so they can win this match.
The difference between the two teams is that Aston Villa has experienced quite good development since last season when they changed coaches and Unai Emery at Aston Villa did not purchase players who spent large amounts of money and the money that has been spent can be said to be quite reasonable, while Chelsea still needs time so we can see their good development, the change of coach since last season, and this season with a new coach and the funds that have been spent by Chelsea remain unchanged and when they face Aston Villa later it is quite difficult to predict, Chelsea can win but lose and draw too it might still be the result they get.
It's better to ignore betting on every Chelsea match, because if you choose other bets like BTTS it's still not convincing.