If that's what you need, and that's what the people you work with require, than that's what you need. Can't argue with that.
Funny coincidence. There's a similar discussion going on in the Pinegrow Forum, and one of the users actually built a plug in to do just what you're asking for. Not sure if you'll be able to view this or not... https://forum.pinegrow.com/t/srcset-and-picture-plugin-for-pg-available/3619