Oh absolutely, there's no doubt that Telegram is extremely effective in the industry and you can certainly get a good grasp on what a project is all about from reading questions and seeing how they are answered, it's super-important to have that network. I think the problem is that for some startups, their focus is solely on Telegram, Reddit and the like that they are neglecting the more mainstream networks which is making the crypto industry into a niche, which in turn the mainstream audience find intimidating to try to become a part of.
Telegram needs to be a (large?) part of a marketing campaign but it also needs to go hand-in-hand with Twitter, LinkedIn, Instagram and the like, however difficult they are all determined to make it for us so far!!