When the vaccine is close you should be taking fewer risks. The potential cost to those risks stays the same, you can still kill your elderly relations and/or develop "long COVID" yourself. But the benefit is much less. Going back to normal life now only nets you a few weeks of normal life with the vaccine in sight vs an indefinite time without.
Also, the hope of a vaccine helps immensely with the mental stress of isolation.
The end is in sight! Hang in there folks, keep being careful!
1: https://www.thetimes.co.uk/edition/scotland/coronavirus-in-s...