Why do some reviewers complain about Logitech scroll wheels and double-clicking?

It's a recurring theme in the high-trust community threads we read. r/MouseReview and r/LogitechG posts on the G502 line and the Superlight 2 cite eventual double-click issues and a disappointing scroll wheel on some units. These complaints coexist with strong overall ratings, so reviewers treat them as quality-control variance rather than universal defects.