I have seen 262's fighting 262's, supprisingly often compared to what I expected to, based on their usage. Part of the rarity is no because its much riskier, as you said, but only part.
The other part is that fights that not only create a good enviornment for 262's, but create an enviornment that is equally favorable for 262's from either side, make up only a tiny fraction of a fraction of the total fights. This means there is a relative lack of situations that have a higher chance of creating 262 fights.
Take into account the chance of 2 skilled (and ballsy) 262 pilots being on at the same time, on the two countries that are taking part in the fight, and both being aware of the favorable conditions. By then the odds of seeing a spontaneous 262 fight are even lower.
Finally, take into account the odds of YOU being not just online, but also on one of the two countries, AND at the same fight AT THE SAME TIME, and you'll see why you almost never see 262 vs 262 fights.
Yeah, not a lot of 262 pilots have the skills (or the confidence at least) to fight a 262 or effecivly engage a horde. Yeah, most are just looking to grab a few kills and get their name in lights. Yeah, they make up the majority. But that doesn't mean there aren't exceptions to the rules. And its those pilots that make up the more skilled minority that I respect.