You aren’t breaking someone’s leg with a push or a shove. A slide tackle is risky. If you tackle recklessly, you’re getting booked. It’s that simple.I get that spiking someone is dangerous, even if it's unintentional. My point is running someone over is also dangerous, usually intentional, and is typically just a common foul.
One unintentional, but dangerous play is given a red card and multi-game suspension.
One intentional and dangerous play is given a normal foul with not even a yellow card.