I have played this game since Paragon but it is the only MOBA I have 100s of hours into. I played for 5-8 hours a day back then, and sometimes just as much now. Ive discussed this topic with players of all skill levels back during Paragon and now during predecessor. This post will attempt to account for the opinions of different player demographics (casuals/HC/sweatlords/etc.) and draws on their knowledge of what effect different types of tower balancing has had on the success of other MOBAs.
The issue: Towers are made of cardboard and shoot baby food. Getting hit by a tower should be a universally terrifying and punishing experience. These characters are out here killing each other with god level powers and weapons. Yet the towers constructed to defend against them are essentially operating at a "Scares away 70% of small children" level.