I think the received wisdom is that you garden first, then use the biodynamic days as an additional aid, so work as a good gardener would first, then if you have to plant out on a non "fruit planting day" you can use any "fruit" day for hoeing weeding etc to help bring them back into balance.
The calandars were set up by farmers for farmers, and if farming is your life it is easier to follow the calandar as you have 7 days a week all year at your disposal, its a bit harder if you are fitting gardening in with other things.
I think the thing is not to make a fetish of it, but simply use it as an aid.