Cabinetry

To change the stain, the doors need to be completely stripped to raw wood. You can't stain on top of stain, it won't adhere. To fully strip will be costly. The most cost efficient is to paint, but the cathedral look will date the kitchen. I haven't done a cathedral door in over 30 years - it comes down to what your budget is

Since you cannot stain over stain, you need to completely remove the previous stain and lacquer with a strong stripper. Give it all a very quick wash with soapy water, let dry. Then you can restain however keep in mind that you still cannot go lighter, you have to go darker. Or skip all that, wash them and rough sand down the cabinets, prime with a bonding primer (Styx Bonding Primer is a good choice) and paint 2-3 coats, lightly sanding between each coat.