Why do birds eat chili peppers?

I try to think of myself as an ordinary everyday “casual evolutionist”. It’s quite interesting to think why living beings are like they are and find the conclusion by yourself.

In this case for example, birds can eat chili peppers with no problem. Of course mammals can’t. The plant is clearly telling us to get away from them being so hot.

But why?

Well, imagine that the selfish genes of the chili pepper plant have evolved to find the most efficient and wide way to propagate their species.

So, if birds eat chili peppers, when they defecate while flying, the seeds of the plant will be dispersed and mixed with the natural fertilizer included.

Voila. The chili pepper plant will have a wider distribution of their genes all over the birds route.

Unless I’m missing something because I’m no scientist and just a simple person!