I get what you're saying, but the faster your connection speed is the easier it is to inadvertently use more data. With my carrier if you hit the monthly limit they throttle you to 128Kbps, which is basically unusable. However, they offer a plan that's capped to 3Mbps all the time, which is fast enough for virtually everything I need and makes it much harder to hit the monthly data cap.

I actually prefer always getting 3Mbps any time I want to use my phone compared to the more expensive plan which might get 30-50Mbps... until you hit your cap and you're throttled to 128Kbps. (But, as you'd imagine, if I'm A-OK with 3Mbps, I have a hard time seeing what benefit 5G brings me.)