@sv. Let's see simple Analogy. Let consider what majority Indians are studying physics in Universities or in Inter. In them how many of them understand Physics correctly. How many students are able to solve problems correctly. You might guess numbers. Now, let's consider same for Astrology. How many are studying them properly (other than for money)??
How many understand this Sastra properly?? Very few are studying them and most of them are using it just for money. So, you find very very few real Jyotihs.