In business, this is how a lot of business is done aka "I know a guy who you might want to connect with". I gather most BDs will have experience in this during their career, after all BDs are their to entertain and develop new business.
However from what I am reading, the problem was with the persons response, e.g. the email response with a link to a tech blog, what happened to the old "Sorry I am not interested" response or "Ok I will give them a call".
I've been most impressed when people, no matter how busy/famous/rich/etc they are, still manage to stay calm and take responsibility for their workload. At the end of the day, the burden to handle their focus rests with them, not others.
Saying to people who might want to help you, "hey, check in with me before you help me" basically asks those people to be your secretary. It's not really my business to know how busy other people are or whether they have the time to take a meeting.
My thinking in sending an intro wasn't "how burdensome will this be for him?" but rather "this is going to be really helpful for him." Maybe you'd argue I should have been thinking the former, but I trust that grown adults can handle themselves, and their schedules, well enough to not need my patronizing concern about whether they can manage meeting someone new. Particularly if their title is "Head of BD."