It's because they are not obliged to help you. Consider yourself lucky if you know someone that use bitcoins even if they don't trade at all. Professional traders will not share information to you because trading is a zero-sum game. They will just tell you to buy a certain coin only if they want that coin to pump. If you hold the same coin as them and you have a decent investment for that, then it would be their loss if you were able to sell first before them when there's a pump.
Additionally, do you really think that they have the time to spoonfeed someone new? They wouldn't exert much effort to talk or help someone unless there's money involved. Of course there are some exceptions but mostly are like these.