This is a bad idea for two reasons:
When it comes to spaced repetition, quality beats quantity. Only put in the perfect nuggets of knowledge. You're walking through an orchard and grabbing a single apple, not a whole trees worth.
Spaced repetition is to stop you forgetting, not for learning brand new things. When you study a topic and have an "aha" moment or you make a new connection, that's the thing you should put in. When you make the flashcard it should feel a little too easy. "I could never forget this, it seems so obvious now!". Doing this means your reviews are almost all easy and remind you of your learning experiences. The few things you forget are easily recalled and strengthened.
Joyful and fun review sessions are the most important thing. Maximising adherence (and therefore not giving up) is far more important than squeezing out a 1% more efficient SRS algorithm.