If you can follow the 1/2" seam mark on your stitch plate easier than trying for a 1/4" seam allowance, then go for it.
Some additional thoughts ...
Most patterns and templates are designed for 1/4" seam allowances. Some designs would be hard to adjust from 1/4" to 1/2" seam allowances. If you stick to very simple quilt designs, then this should not be an issue, but even with simpler designs it would be best to mark all the changes on a printout of the pattern.
Those larger 1/2" seam allowances might overlap in a medium to complex 6" block. If so, then you would have the additional work of trimming those seam allowances.
You would be placing more fabric into your quilt. This would result in higher costs to yourself plus a warmer quilt. The latter might be a bonus in colder areas, but detrimental in warmer climes.
The front of my Bernina stitch plate and presser feet have 1/4" marks (and sometimes 1/8"), which help me align my fabric. I did not discover this until I had the machine for a while. Depending on your machine, it might be easier to get that "scant 1/4" seam allowance than one might think.