Did you have the MGB top with the metal frame separate from the top? I would often continue driving in the rain because I didn’t feel like dealing with it .Some years ago, a co-worker raised the top on my MGB just before the rain started. I was working inside and wasn't aware that the clouds had rolled in. I was glad for the assist.
We can only hope that courtesy such as what the OP demonstrated isn't another casualty of this increasingly intolerant world.
To the OP, I would have appreciated someone closing my top like you did.