Use their age/stage as a reference for their ability to understand you. Presume they’ve had experience with people who didn’t really like to get advice, and refer back to that.
They might need to turn their being older into a plus, instead of a minus in the workplace and the community, and they might be filling the role of older advisor to do that. This is an opportunity to let them know that at their stage they have value (but in a different way).
By the way
Sorry for the unsolicited advice 🙂
I totally get why you’re irked. You’re not a kid and you want to be recognized for your wisdom as well (and your not being).