YEP!! We've done the same. I'm a nurse and got vaccinated in Dec., but the EU is so behind on vaccinating and I think IF they open their borders this year, I don't want to be around 10s of 1000s of people who may not have been vaccinated. WE personally don't want all the restrictions and regulations that will definitely be in effect the first year or so. But everyone must make that individual decision.
Remember that being vaccinated, we can still get and transmit COVID to others = as it's a mRNA vaccine, so it's a protein replica of the virus, meaning IF we get COVID, the protein replica with 'recognize' the COVID virus and attach to it, making us LESS sick and Covid won't kill us - but we can still get it and pass it to others.
We usually go to Europe every other December for the Xmas Markets, we do a River Cruise for a week and then travel another 7-10 days on our own. We canceled for this Dec and rebooked for Dec 2022 - when we notified our hotels in Germany & Austria, even they said we made the right decision to cancel and reschedule for 2022.
We have booked a trip to Jackson Hole Wyoming instead and can't wait to go there!!