Try Or Not

They say you'll never know unless you try,
But isn't that likes saying you'll never know,
How deep a well really is unless you jump in it?
If a hot stove will burn you unless you touch it?
If a wild dog will bite you unless you pet it?
If a needle can hurt you unless you prick your finger on it?
If you really love someone that they won't hurt you?
Or much worse, if you love someone you won't hurt them?
You'll never know unless you try, really?
More like you'll never know its poison unless you drink it!