People are judgy about money. Money is a reflection of your values and priorities in life, so it makes sense that others judge--it's a hugely loaded topic, maybe the most loaded topic there is.
An anecdote: The diciest relationship in my life is the one with my mom. She is a difficult person to get along with and is horribly insecure. For my wedding, she wrote me a check for 10k, no strings attached, and told me I could use it however I wanted--wedding, down payment, savings, pay off student debt: whatever. FWIW, in my opinion, this is the best way for parents to help out financially with a wedding.
We decided to use the whole thing on our wedding, and thus 10k became our wedding budget.
Now, a little background: I happen to be a schoolteacher used to living on a small salary. However, I come from a family of multi-millionaire stockbrokers. I have been to some fancy-ass weddings thrown by my relatives. The summer before my wedding, my brother had a wedding that had to have been $50k-$60k (he married a stockbroker's daughter).
My mom didn't marry a rich guy, and she has made some somewhat poor decisions with her money. $10k was very generous of her, and that seemed like a reasonable amount to spend on a wedding to me. Hey, I'm Mustachian; finding deals is fun! We planned a gorgeous wedding for 150 guests that looked like a million bucks due to lots of help and hookups from friends.
When my mom showed up in my now hometown a week before the wedding (she didn't help with any of the planning because it would have stressed both of us out way too much) I made the mistake of constantly harping on all the bargains I had gotten. Over and over I mentioned how little everything cost, because I was so proud of all my frugal accomplishments.
This made my mom eventually lose her shit. To me, all my conversations with her about my bargains and hookups were points of pride and excitement. To her, it was rubbing it in that she couldn't give me the kind of fancy-pants wedding my cousins/brother had. She felt shamed. It took a lot of apologizing and cajoling on my part to get her back into the spirit of things, and I think (three years later) the whole situation still bothers her.
Lesson learned: not everyone is in a position to rightly understand your money choices. Pick the audience for these discussions very, very carefully. Don't expect people to understand. Love them anyway. And for god's sake don't bring this stuff up.