Food being all plant-based is not in itself healthier for us. What people include in that is alternatives for animal products they have liked and want to continue with something like any one of those, closely enough. Those alternative things then have a lot of what is processed, that they are not anything left natural at all. There are healthy benefits to have but that is with naturally growing foods, left as whole foods, while these can be added or mixed with each other, but not with chemicals or processed stuff added, this would be the healthy way.
https://www.greenmemag.com/health-nutrition/7-days-on-plants-only-heres-what-happens-to-your-body-and-mind/