Water is a remarkable liquid. It's a solvent that dissolves all sorts of other chemicals. Effectively these are different varieties of water. Maybe there are other simple molecules with amazing properties of versatility which chemistry could be based on. Hydrocarbons for instance, but these are thought to have been created by life rather than chemistry. They are used as signs of life.
I think the conditions for life are far more narrow. It would not surprise me if this was the only planet were conditions were just right. To recreate our conditions by chance would involve the combination of so many variables as to the universe not being big enough to hold them all.
For instance if there were 100 variables that all had to be within 1% for life to kick off then that would be a chance of 1 in 10^200
However if it was that easy then they would have made life in the lab by now.
How hard is it to make an iPad? Probably need better than 1% tolerances on more than 100 things. You don't make one of those by chance.