Re the bit in bold:
There is more than one way to explain that, ie, when you say your 7 iron is reliable, do you mean for distance or accuracy or both, many a time, we amatuers will have X Yards to go to the green and will say to themselves, “That’s my 7 Iron” they hit the 7 Iron and come up short, now that could be because the distance they believe they can hit the 7 Iron is their sunday best and not their average 7 Iron.
Also if as in your case you know your 7 Iron is going to come up short and that is your intention, then the comment wouldn’t apply to you.
I use Game Golf and have for many years and when first analyzing my stats I expected my driving to be poor, but the reality was was that my driving was slightly above average and my biggest issue was being short in to the greens from 200-100yds, when using a variety of clubs.
Fair point, some people think they hit clubs further than they think they do. But yes, mine goes 150 yards on a normal swing and I'd consider it reliably straight. As I've got better I'll happily hit 5 or 6 iron into the green but occasionally I'll still hit a 7 iron where I'm concerned about my lie/miss/bunkers etc.
My driving is the weakest part of my game, or at least the most inconsistent.