Sort:  

By that token, black holes, extra solar planets even the big bang are merely speculation.

We don't know that wormholes are stable. In fact the math shows they'd be hard as hell to stabilize.

But we do know they exist because the math says they do, and they explain a hell of a lot. For instance Leonard Susskind has done work showing that quantum entanglement's non-locality problem can be best explained if the entangled pairs are connected via a wormhole.

I find math and physics pretty convincing even if it's simulations and models

black holes, extra solar planets even the big bang are merely speculation.
Imagine that.
Not extra solar planets. There is actual physical evidence to support that hypothesis....not just bits in a computer.

No, not really. You have dimming that has been measured as predicted in simulations. This is best explained by extra solar planets. We've never actually taken a pic of one.

dimming that has been measured..... actual physical evidence to support that hypothesis