if you feel agrieved or insulted then perhaps you should look more objectively at your postings, or in simple terms get out more?
I rode yesterday at a practice ground, and at a very smal venue there must have been close to 80 local riders , competing.
If you think a 4rt is too expensive then you need to look at a) the way they hold there value, and b an older model which are reasnobly priced.
no one has said there is one reason trials are reducing in numbers, just your thoughts are way off what others are seeing and experiencing.
Take a closer intrest in other sports they may suit you better?