Of all the mildly irritating experiences in the life of a developer I think juniors asking what you consider redundant questions ranks lower than office politics and a daily commute. Fortunately juniors can be sculpted by quality teamwork and leadership. My job as a tech lead is to be patient and use my experience to point people in the right direction. Some juniors don't know what questions to ask Google so I am glad they ask me and don't push a PR riddled with wasted time that I could have helped with.
I consider myself lucky to be in a position to teach and curate happiness. I was once a junior and probably asked some stupid questions that I could have just Googled but I didn't know what I didn't know.
If people are holding up meetings with low level questions you likely have involved the wrong people in the meeting. Every problem presented in the original comment has a solution. By all means let someone go if they are struggling so much that they are unhappy, else it's on you for hiring poorly or leading poorly.