That's an extremely high bar, no?
The bar is there, but it is lower than you expect. If you have a truly unique point of view to express, that brings some value to the table, slots will open up.
And I've spoken at plenty of conferences. :) Not always in the glamour rooms/slots. But... I did have one talk fill a room out the door. That was a talk on a difficult/controversial topic, and by then... I was probably about as expert as they came on the issue.
I didn't start with that though. I just started with a simple point of view talk. And I'd argue the second version of that talk is still one of the best I've given in my life.
Some talks are plain craftswork, not unique experiences and still very worthwhile.
I want to make the conference committee choose between "Do we want ilc's talk on X." or "Do we want foo's talk on Y." If we are both discussing the same thing, if I'm unknown, I will lose. OTOH, if I have something interesting to talk about... I have 2 routes to "victory". "ilc gives great talks, he gets good grades and is working on his skills." and "Man that's a damn cool topic. We want that at our conference, even if ilc isn't the BEST speaker, the combo is better."
I didn't start out as the best presenter. I learned. But I always knew I had to have an interesting topic, something that made it worth them giving me a slot.