Yes, and no. More spokes means that a wheel with equal load capacity can be built with more spokes at lower tension, and possibly a lighter rim. But there's a world of difference between what's possible, and what people do in real life.

While fewer spokes requires higher tension (and rims that can take it) I've known builders to adopt the philosophy that if more tension is good, the most tension is best. That most definitely is not true.

I've had people who've had wheel problems referred to me and after delivering a pair of wheels, had them turn up their noses because they "don't have enough tension". My standard approach is to ask f the wheels they had before had more tension, which they confirmed, and then asked why they expected me to solve the problem doing exactly what the others did.

In one case, I ended up dismantling the wheels, and returning the hubs and payment rather than try to please the buyer.