I totally disagree with the 3x risk of obesity… my males that were neutered were never over weight, nor were my bitches. Basenjis are quite pre-disposed to hypothyroidism, neutered or not, spayed or not.... and while as said there are pros and cons on both side, you could make the case for each one of them on both sides of the fence. So it is up to each person to make the decision that works for them. For me, as a breeder, I am quite comfortable with my decisions to spay/neuter and to place all pets on spay/neuter contracts.
Risk is simply that, it's risk. It varies by breed but the research done was with various breeds and multiple dogs.
I'm not in any way saying neutering is bad. My point is that leaving a dog intact is not 100% wrong. It's a marginal difference when you weigh our the risks and benefits for both cases. Some may say neutering imposes more risk, some may say leaving them intact imposes more risk.
I agree with you about going with what works best for them. For me, Kananga will never be out in the open on his own. There's no social risk. So it all comes down to behavior/health.
I don't fault anyone for their decisions, unless its a dead giveaway that it was a poor choice (i.e. leaving a male intact that is around intact females unsupervised and no intentions of breeding).