No you are not the only one.
Each Mom does as they feel is best.
Sure, kids this age benefit from Preschool. They learn a lot in many ways and get academic prep for Kindergarten.
But there are also many Moms who "homeschool" their kids, and their kids are home.
And yes, there is a lot of "pressure" to have a child this age, IN a Preschool or enrolled in a program.
I feel that too.
My daughter went to Preschool from about almost 4 years old. She wanted to go. She was happy.
My son is 3... and he is home with me. I am a SAHM. We cannot afford to enroll him in a program or school right now. So that is our reason. Also though, unlike my daughter, he has no interest inn going to "school." And his "readiness" is different from my Daughter. So, I shall wait and see, regarding my Son.
Ultimately, go according to your child's "readiness."
But at this age, they do benefit from learning age-appropriate "schooling" or academics. The website
http://www.carsondellosa.com/cd2/default.aspx?HolderName=...
Has a lot of resources for "teaching" your child at home.
This is what I used for my kids.
All the best,
Susan