What I like about them is that they constantly get new cards, story updates, and more content to fangirl over. What I don't like is the pressure to pull and the fact that you can't fully enjoy the content if it's locked behind purchases. The experience doesn't feel very immersive.
Overall, though, gacha games give me burnout in the long run. I've quit several joseimuke games and only stick with a few because I like the characters and the gameplay is simple. BUT what I value the most is the story.
I tried Tears of Themis, but I only read up to ch. 3 of the main story. After that, there are things like bond stories(?), which I haven't readed it and I'm not even sure how they work. Cybird games also let you read your character's story by spending tickets, I think, but I never got very far. Their usual gameplay just didn't catch my attention.
They're not bad games, but they require a big investment, whether that's time, money, or both. If the system isn't rewarding on its own, such as having good pity system, no event reruns, or no fully voiced stories, then I doubt I'll give otome gacha games another try D: