Imo popcorn buds are more likely created by removing leafs, you're robing the plant of ability to grow, it's leafs that grow big dense buds.
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Hiding under the shaggy exterior lol.
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According to my own observations removing them directly affects root growth and slows down upper growth, slowing growth is my primary reason for defoliation. Its all done before settling into flowering where possible I like a full canopy after stretching.
Don't get me started on the multiple other roles leafs play like co2 absorption, transpiration and storing starch that gets used during the dark period, it's scientifically verifiable with a iodine starch test not to mention we've all seen yellowing plants after prolonged dark periods.