PS:

The best way to deal with the anxiety of the unexpected is through rehearsal.

• Start by thanking them. "Thank you so much for sharing that with me. I appreciate your willingness to be candid with your concerns."
• Validate their concerns

• Prepare your nudge: Think of one on-topic question you want to see answered during the meeting and write it down. Even if you get "cold-called", you have at least one thoughtful question.
• Rehearse your introduction: Don't say: "Hi, I'm Haruto, ...

Sales pitches are personal emails without unsubscribe links. But if you don't respond, you can often get more email from them.

Set up text replacements. For example:

noint = Not interested but thanks; please remove.

nove...