Sure, a person who can discuss how, in his experience, it's been possible to get clients to pay for X by doing Y, which to some extent overlaps with your domain Z is potentially offering you much more valuable insight than someone who simply asks "have you considered doing Y?"
But the usefulness of the insight you're able to provide is an essentially separate issue from coming across as a jerk who blithely insists they can fix others' business. It's possible to discuss your experiences with Y in great detail and still be that jerk (because you come across as assuming that experience must be relevant and your way of doing it was right), and conversely possible to have no experience of Y whatsoever other than reading an article on it and still be asking a very reasonable question
If someone thinks you're an asshole for simply for asking whether they'd considered a Salesforce integration, they're almost certainly the asshole.
But the usefulness of the insight you're able to provide is an essentially separate issue from coming across as a jerk who blithely insists they can fix others' business. It's possible to discuss your experiences with Y in great detail and still be that jerk (because you come across as assuming that experience must be relevant and your way of doing it was right), and conversely possible to have no experience of Y whatsoever other than reading an article on it and still be asking a very reasonable question
If someone thinks you're an asshole for simply for asking whether they'd considered a Salesforce integration, they're almost certainly the asshole.