Whether or not they booked the church, restaurant and sent out the invitations a year ago, or two months ago, they certainly didn't stop to think first.
A year ago, anyone with any sense could see that we were not out of the wood, so why plan a large wedding?
The sensible thing to do would either have been to postpone their wedding indefinitely, or to marry with only their parents and other immediate family present. They could always hold a big party once the pandemic is a thing of the past.
Most couples these days have lived together for years before they actually marry, so I don't see the point of these large weddings.
So no, I don't think OP that you are being unreasonable. If you are, then so am I.
My sympathies go only to those who can't attend funerals due to the pandemic - they cannot be put off indefinately after all.
Christenings are like weddings. Hold the ceremony with only the parents and godparents present and have a large party later when large gatherings are without the threat of illness.