The word ‘frequently’ suggests that. You’re doing a repetitive task. If your modeling workflow consists of subdividing a selection of edges repeatedly, that sounds strange since I don’t model like that. It’s also strange because depending on the selection, it can require even more work to clean it up. Or it might just be a selection problem. Can’t know without specifics.
I’m not saying you wouldn’t need the change since I don’t know what you’re actually doing. Just suspicious about the benefits of having subdivision changed to modal for everyone.
You’re mentioning a tool change but no reason for it. If you’re cutting a lawn with a knife and suggest that knives should have double blades to speed up your workflow, that would sound strange. If you’re cutting grass next to an anxiety clinic, that would make more sense, but people might still suggest a scythe since there are many ways of cutting grass without making too much noise.