I tend to find that guides use the path of least resistance when trying to get a message across.
So, let's say you buy an angel-number book or some other number book (or are drawn to buy one). You read it and get more curious about it and from there you start to pay more attention to numbers and their meanings. Next, you start to notice numbers repeating around you e.g. 222, or if one of your strongest senses is clairvoyance you may get numbers in your meditations or numbers popping into your head. It doesn't necessarily have to be numbers, it could be symbols, animals, flowers.. whatever..
Also, the path of least resistance could be when you randomly stumble across a book that is relevant, or a conversation that covers things you were wondering about.
IMO, expecting most answers to just come from a conversation with guides is pretty limiting, and you might be missing all other responses that are being given to you in other ways. Just because they aren't speaking to you doesn't mean that you're not being heard or they're not going to guide you in some other way.
It's hard to understand guides motivations because all we have is our own perceptions/interpretations/assumptions. We don't have the whole picture and what idea we do have is based on our own physical experiences and personal biases.
Unless Guides feel it is okay to share and it's a part of your path, e.g. who they are and what they've agreed to do, or what you're here for, then you're not going to find out. They're also not going to interfere with your free-will. The information may also come at a later time, when you're ready.
Also, you may not be getting the help or the answers you need because it is what your ego wants and not your soul or higher-self wants or knows is best.
If you find yourself walking down a less favorable path then you're probably going to hit a few walls or slow down (+ things just won't seem right). In the end, it's your choice to either keep going or to change direction.
Your guides won't always stop you if you resist things or push against things, and they and your Higher-self may feel that the best way for you to learn is to fall flat on your face.
I think Erin's 'Like Rats in a Maze' article was pretty good, as it covers paths. Like Rats in a Maze
Perhaps in the instances where your guides aren't saying a thing is because they're trying to get you to trust yourself (push on and persevere) and to rely on your own perceptions/intuition to see you through. They're not going to hand-feed you everything, especially in instances where they know you're fully capable of accomplishing the task. Also, if you're not getting much information from guides try going straight to your Higher-self/Source to see if you can get an answer. Trust is important. Don't feel discouraged if things aren't working out as you like or if the pieces aren't falling into place quick enough. Trust it's for the best and that all things fall into place at the right time.