It's possible that Bournemouth will win Chelsea because of their consistency in their previous matches. Chelsea's performance is not stable and unpredictable which makes it impossible for you to rely on them. Bournemouth is in their best form and shouldn't be underestimated because they don't have a big name. Chelsea needs to improve their performance if they don't want to be bonus point for Bournemouth.
Chelsea are experiencing a decline in performance lately, where in the previous 4 matches they have not won even once, so it is clear that the match when hosting Bournemouth later will not be an easy match for them and also considering Bournemouth are in a positive phase this season so I think even though Chelsea chances of winning are higher, it does not rule out the possibility of losing again.
Thus the safest bet in their match is BTTS.
Chelsea is not performing well like starting of the season, they are only drawing games now, he is causing them to lose points in the league and allowing other clubs to catch up to them in the league standings. Chelsea must do everything possible to secure three points against Bournemouth this week in order to remain in fourth place in the table, if they fail to do so, they will undoubtedly fall behind because Newcastle will defeat the Wolves and overtake Chelsea in the league table. So I believe Chelsea will not make mistakes this time to drop points, and since they are playing at home, they will attempt to win to preserve their position in the tournaments. Chelsea generally has hope against Bournemouth because they usually control the game and win it. Let's see how the game goes and if they can win it or not. This season, Chelsea has been in great form and is expected to win the league title, but with how they are currently playing, you can see that they have lost form and will need to work even harder if they want to achieve anything this season.