I think you would have to make an analogy in the field they are in.
To take the painting analogy, you can say - you are painter and you do not need to know how to actually create the paints. you just go to a store, buy the paints your customer wants in their house, buy other tools you need to actually paint their house and then go finish your job.
making the paints up to code (lead content, chemical formulation, etc), buikding the paint brush, the right paint buckets etc, is the job of the platform teams 🙂
I hope this helps - i tried lol