I thought the same thing a year ago when I started. I have sewn all of my life with a 5/8 inch seam. This 1/4 idea just seemed scary to me.
However, I have found that 1/4 is plenty. I did have to buy a 1/4 inch foot to put on my sewing machine to guide me, as I just can't do 1/4 on my own.
Just food for thought. Using 1/2 inch will work too, unless you go for really tiny pieces or have multiple seams intersecting...