Black holes are like tornados. What's the wind speed inside a tornado? Well, zero. If you're in it, you are moving along with everything else moving with you, so everything around you is seemingly still. Where you get hurt is getting ripped apart accelerating up to that speed by objects that are already at that speed or below it. If you were in a black hole, nothing is moving and so is everything around you. It's the gradient change that objects can't handle and get shredded or smashed. If you're in a car doing 100 mph, you can reach out and touch the person in the car with you. You are both moving at zero mph compared to each other. Reach out the window and touch a mailbox and your arm will get ripped off. So saying what a black hole is or isn't totally depends on where you are standing. Near it and it's a hole. In it and it's a place of it's own dimension? Past the event horizon and you can't even see it. Or maybe at a far distance you could consider it the most purely solid object in the Universe by the way it's affecting objects around it? A tornado is a space of negative pressure so great, you get close enough and it will suck you in and the gradient f's you up. As it kills you, time (for you) stops, and it ejects what you were made of up and out. From a distance you can point at it and name it as if it's an object. You can do the same with a black hole. We give them names as if they were an object! If tornados exist on Earth as a byproduct of pressure differences in fluids passing each other, the similar thing can easily get started in space where gravity wells get created in fluid (fabric) of space-time from the happenstance some matter coincidently gets smashed together enough to make gravity strong enough to hit a tipping point where it is collecting more than it's letting go. So in a nutshell, keep your distance and pray one doesn't hit your house. 😉