I agree, if someone tried to promote bitcoin to me I will be suspicious about their intentions, it was not until I discovered bitcoin by myself and I investigated what it was about that I decided to become part of this market on my own, and I am pretty sure most people follow a similar process, so it is better to let people to come around on their own, after all there are a lot of lies being spread on social media about bitcoin and some people do not know what to think about bitcoin anymore.
In my opinion, it would be suspicious as you have said especially when you don't know the person who wants to promote bitcoin to you. About discovering bitcoin or knowing about it is mucu better if you have someone close or someone you know who will guide you or teach you about bitcoin compared to learning on your own. That's also the reason why bitcointalk forum exists just for this reason which is to read, share, discuss and learn.