I don't have enough data to support or reject.
I don't know what he really said - I don't follow or watch him.
We may come to know in our life time - we may not.
We do know that - the Sun & Moon's gravitational pull causes - High tide, low tide (Spring tides, Neap tides, Perigean tides).
In other words - the moon's gravitational pull affects the entire Earth, but because water is less dense than land, the tides are more noticeable.
So, since it affects the entire earth - in some small scale - it could have an effect on human body. Could be insignificant - maybe there is something there to look into. We don't know.
So, why would you think the rest of celestial bodies won't have some effect too?
Does Microwave change the taste of food? I think it does.
Will we find out if using Microwave is bad and how bad soon. I don't know yet and so I use it as needed.
Did folks years ago knew asbestos dust is bad for you or your lungs? We found out. Didn't we?
We don't know many things. No harm in trying to find out. Don't go against someone who is trying to find out.
How do you know what Trump thinks?
Is it bad to have someone behind you or against you?
How do you get the job done more effectively?
Who needs a nagging voice around them all the time when you are trying to accomplish something?