Like basically everyone, I think the happy couple should do whatever they want wedding wise, but pay for it themselves.
My own wedding situation was weird. I was 23 (and only child), the groom was 25, and my parents, especially my mother, were determined to give us a huge, perfect, traditional wedding - which neither I nor the groom wanted. But because we were dutiful children, we let them commandeer the whole thing. I had a fancy white dress, lots of bridesmaids, etc. etc. We hated it but did it out of respect.
Then until the day she died, my mother held a grudge because I didn’t say “thank you” for all the money and effort my parents spent on the wedding. Yeesh. Traditions are okay, but blind adherence to them can produce some mighty dumb results.