We are quick to judge because we have a lot of experience. I am happy you saved your foal, and 4 years on still heartbroken that I lost mine due to respiratory failure, despite all our best efforts.
Maybe I did it wrong, hell if I hadn't of had the vet to him, maybe he would of lived.
I couldn't of lived with myself if I hadn't called the vet though, because we don't live 250 years ago, we live now, and I don't want to treat myself with grannies remedies, so why would I with the horses?
I would never ever take a chance on not having a vet to a foal, I will home treat some things in older horses, I do believe we over medicate, and I believe strongly that we overuse antibiotics, and when we do use them we don't follow instructions, and that has caused us already, and will into the future cause us no end of issues.
Back to the op, you have to understand that to 99% of us, any medical situation with a foal is an emergency, they can go downhill so quickly, it isn't safe to take chances.