No, I use curl similarly and a lot. Where I find Postman convenient is when using it against services that use OAuth2. You authenticate once, it fetches the token and you are good to go. Could I script this with curl? Sure. Do I want to? Nah.
This can get old fast when debugging things and when piping through jless or something. Having a nice app that stores the request make it easier to come back too after a few days away. But Insomnia and others went wayyyyy overboard with all the sub sub sub projects. I'd like to have something in the middle.