It did cross my mind that you might be joking. But I've heard pilots advocate similar deception in earnest, so I replied accordingly. (Note that other pilots here commended the "wisdom" of your advice, not the "humor".)
Then you weren't joking after all?
Why not just be honest? "All pilots need to improve in some area. This is a training flight, so don't worry if the instructor points out some mistakes I make."
If a pilot doesn't think their passenger can handle that simple truth, there's still no excuse for lying about it. Just don't take that person along.
I am not joking, just trying to make a serious point with humor.
I may be wrong, but I'm guessing you're under 30… and either recently or never married.
I work in finance where I believe total honesty is required. I don't think it is when dealing with a spouse who's frightened of flying. The "honest" truth is that 75% of private pilots should never take passengers. They should fly alone. The reason is because their skills are not up to snuff. I include myself in that category. And I probably haven't been completely honest about the risks to my family.. Are you? Do you really know how good (or bad) you are as a pilot?
Could you be lying to yourself about your skills? Unfortunately, to get through life with all its risks, we sometimes have to economize with the truth. The notion that you tell everything like it is is likely to be the position of someone who is earnest and lacking in experience and young.
I'm not trying to be unkind… I just think you're ignoring that the wife may well have good reasons to be worried. That she let the kids go up means that she's willing to take the risk to make her husband happy. It is an expression of solidarity. Some risks are worth taking, but they are still quite real. So she senses the risks (which are real) but is willing to accept them for the upside of her husband's happiness and the value of going places in a plane. Why rub her nose in the risks which she already senses?
Fewer people would fly with their crazy husbands or dads (and it's usually men who are the pilots) if it were spelled out what their skill levels really are. My wife probably would anyway, but what we're really talking about is permitting someone to get comfortable with a decision they have already made.
When you say "Why not just be honest," I have to shake my head because that would really cut the number of people going up into the air…. Much of flying for private pilots is about being DISHONEST about our level of skills to both ourselves and our families. I'm not sure that's bad. People usually know the truth anyway.
It's just not always necessary to put everything into words, which the young mistakenly conceive as "honesty."
I also believe that taking this sort of risk is one of the things that leads to happy marriages and families. Just a certain percentage are going to lose the bet. It's a risk worth taking, but you won't take it if you're brutally honest about the downside.