Realistic UBI proposals wouldn’t exactly provide a comfortable wage. They’d provide just enough to get by on the basics, if that. That doesn’t mean it wouldn’t be helpful, but it does mean that it won’t be an attractive alternative to work for anyone who isn’t comfortable staying poor forever.
UBI would still be a safety net, not an attractive alternative to working. The idea that UBI would enable people to become free of work and follow their dreams for free has been greatly exaggerated. It’s just not possible to tax enough to pay everyone high UBI wages. Safety net wages, maybe, but it won’t be a fun living situation to depend entirely on UBI.