Old school coercion through use of managerial position. It still surprises me how many managers masquerading as leaders still do this.
There’s a great way of saying no under pressure and that’s simply to say “You know what, that does sound interesting, but it’s not for me right now but I appreciate you asking” and your follow up for when you get pushed is “Like I said, it’s not for me right now but I’m sure someone else will be better placed to take you up on it”.