if there is no other option , it wont mean you must go a and throw the money away. we can use it to develop our light fighter program until other option become available or it become advanced enough so we can move on to heavy fighter program .
we can invest it on our drone program and develop an interceptor drone .
when we talk about modernizing Iran Air-force we are talking about at least 10 milliard dollar of investment maybe more you can't just throw it away , you must think what you can do with that money.