Well, I agree with you, giving shot one time wont harm. but since rejection ratio is too high I am not big fan of Visit Visa."Not advisable to apply" - this is incorrect. It doesn't affect your application if you apply and are rejected. There is no problem giving it a shot and seeing if you're able to obtain the visa. No negative impacts other than if you're denied you're out the money you spent for the application (which isn't too much anyways).