is this a safe way to supply the gate with safe voltage to use the scr?

 

Yes, it is fine. You probably don't need the extra resistor to trim the gate current.

 

The probability of failure of the device increases.

 

I think that the gate is reverse biased with respect to the anode, even when the SCR is on. If you have a very fast risetime gate drive pulse that is not current limited (doesn't have a series resistor) then that could get you very large gate current spikes. Can't think of any other explanation, which doesn't mean that no other explanation exists.