Whether this is an advantage or not depends on your values.

And herein lies the problem. The absolute majority of Reddit users did not care enough to switch platforms, just as the absolute majority of Twitter users didn't care.

What those people do care about, if they ever were to consider Lemmy to move to, is that it provides a similar ease of use as Reddit does. And currently, Lemmy does not.

Besides that, I don't see how this fits the analogy about cars vs. pickup trucks you have given. Pickup trucks can be used as cars, albeit not as optimally as your average sedan. But they serve another purpose, carrying stuff around, that makes them superior to cars. With Lemmy vs. reddit, all you really choose is who gets to moderate you. There is no different experience using either platform. The only difference is that, at least for now, Lemmy is a lot more difficult to use.