100% agree - I never saw the rationale for the government making risky investments, just because purportedly nobody else does. Imagine your bank adviser telling you they are going to put your money into high risk investments because nobody else does. Yet if the government spends our money like that, few people seem to realize that it is basically the same thing happening.
But I agree with you that it is not the government which should be taking those risks, since (as others have pointed out in this thread), governments really don't know what they're doing in that regard.