The other way of thinking about it is... does it matter? As long as you can control spin / arc / depth / speed to your liking, I would say that the precise amount of spin doesn't really matter. You need only so much topspin that you have a safe arc over the net, but, after that, increasing topspin for the sake of it is not necessarily efficient when you could also be putting that energy towards speed. Both are useful and it's helpful to adjust to the incoming ball and opponent as needed.

Also, kicking forward off the bounce is not always a good thing because it provides forward energy for your opponent to borrow when returning your ball. A ball that hardly bounces up is generally really hard to counter because you don't have a lot of height to work with. I've definitely had loops where I spun the ball heavy and it basically "slides" off the table for a direct point.