That's the thing, though, there's been a number of players who score .6 nonPG/90 while being fairly detrimental to their team in all other aspects, and without playing in a team as potent or talented as Real Madrid (which will naturally give what might be a lower average/90 a bump). Walcott, for instance, scored .6 nonPG/90 in 12/13.
That's true about Giroud and sample size, but when he's been in a starter in recent seasons he's put up similar #s (.6 and .7).
The point is, at this stage in his career Ronaldo is an incredibly average/mediocre talent, who gets the starts and respect he does at a club like Real Madrid on name and 'aura' and 'marketing' and all that shite alone. And people are able to make him look a lot better than he is by using his goal tally with penalties included.
Tbf, Walcott is probably a better example, as his .5 nonPG/90 would probably be .6 or .7 at Madrid, and he's similarly useless to Ronaldo in other phases of the game, and plays the same position as him (wide forward), unlike Giroud. Given the amount of hate Walcott gets I'm not sure that would be a better or worse received comparison, though, and the Giroud comparison is just a bit more fun.