Most people aren't going to the Olympics. Neither are my horses (you also don't need a syndicate to buy one, which is nice, lol). My horses can, and happily will, take most people up the levels as far as they want to go, then switch disciplines and do it again and they will be a safe, happy, healthy pleasure to be around while they do it.
I love your attitude about breeding - healthy, willing horses for today's riders.
The way the horse industry has been evolving for the past couple decades, so much land is getting lost to development so normal people can't afford good horses anymore. Show venues, especially eventing venues because they require a lot of land, are going under because training-level and under riders are finding it harder to afford to event, and the pressures to develop these lands keep getting more dire. This makes it harder for the top-level people as well, because let's face it, the fees from the 75% of lower-level riders is what allows the show to be paid for, so the top 25% have a place to go.
It seems like the horse industry, more and more, consists of mostly the extremely wealthy with their 17h imported Warmbloods who can only do one discipline, and the backyard-breeders who don't geld or train their grade colts and fill the auctions with poorly-conformed and untrained colts and fillies.
I know, I'm exaggerating somewhat - there are plenty of people still who responsibly breed nice ranch, trail, 4-h, pony-club horses, but horses like this seem to be getting harder and harder to find. In my area, a 14-15h mare or gelding suitable for a child to do Pony Club and take the kid from Beginner Novice to Training level, is like a Unicorn. And priced accordingly. These horses and ponies get passed from hand to hand as each child grows older and the horse gets outgrown - and who knows where they end up in their old age, probably the local auction, where all the throwaways go who got too old, or injured from doing the same thing year after year.
What you're doing with your breeding, is providing horses suitable for a lifetime. Not the type that's that only suitable for one discipline and gets passed from owner to owner every couple of years. Your horses, when the owner is young, they can take them to lower-level shows, and sometimes even higher-level if the rider puts in the work and has a bit of luck. Then as the owner ages, the same horse can teach their kids to ride, go around the trails and to new places in the wilderness, and later wear a harness and till the garden, or take Grandma for a ride in a cart.
And all the while, they stay sound, vet bills are normal, they have good hooves that don't require special shoeing, they are easy keepers who stay healthy on decent hay, vitamins and mineral salt, a scoop or two of grain when they're working.
And they're happy to do whatever you ask, at every stage of your and their lives, truly a partner horse and a family horse. We need more of these.