From the bare facts of the matter, no, you would hope that nice people planned for a nice day for all their guests - maybe including, as a kindness, friends of the parents, since family of their generation aren't attending.
However, I'm afraid you're coming off as a little martyred and self-pitying OP, and that always makes my spidey senses tingle as to how things have gone on before, and how obligated they SHOULD feel.
I see this sort of upset in relationships where there's poor communication - lots of aggrieved asides about the relationship that 'should' be there, but little done proactively make it happen, then a lot of hurt feelings when the expectations aren't met. You can't give people £30k and pretend it's strings free when there are in fact strings. You did a generous thing, but you did a disservice to yourself by giving money without addressing what it meant to you.
FWIW, I am engaged, my parents may or may not offer money, but I will ONLY accept it as a gift, not with conditions. My fiance and I saved 55k for our house deposit because we knew that my parents would give us money, but expect an input into the choice as they did with my brother (and obviously we didn't need the money anyway). We're inviting plenty of aunts and uncles who are both friends as well as relatives to them, and we just wouldn't want some of their friends (who they have no idea we dislike) at our wedding.
My MIL to be is giving us money (again, we don't need but will gratefully accept as a gift), but she's already been round for a chat with me about things, and said the main thing is doing it how you want, and what she wants for us is a day that's as we want it - no looking at photos and wondering 'who on earth is that' down the line like she had to.