Not every witch is going to be okay with receiving “Blessed Be.”
For me I know that I’m not comfortable receiving it. I’m very uncomfortable receiving it in fact.
If a witch is okay with it then “blessed be” them, if they’re not okay with it then simply don’t. Remember, not every witch is going to be comfortable receiving the blessing “blessed be” and I know it’s in good faith but don’t if they’re uncomfortable with it, respect their boundaries like you expect them to respect yours.
Now, some may be wondering why some are uncomfortable by the phrase and that’s because it’s origins are rooted in fertility, sex, and the blessing of genitals. Others are uncomfortable with being “blessed be’d” because they don’t want unsolicited religious blessings and “blessed be” is Wiccan religious blessing and not every witch is Wiccan. Hell, some witches don’t have a religion at all.
So yeah, unless a witch is okay with it don’t “blessed be” them and respect their boundaries.