I will never understand this bizarre obsession with gut flora. We don't know what is normal, what is a beneficial ratio or when a change happens if that is good or bad thing. No one besides the people who study these things should be much attention to gut microbiomes. We just don't have enough information to let this be an influence on decision making.
We know that it's really important to neurological function, which is enough reason to be careful.
Your comment seems a little flippant honestly. I know what "disrupted" is, trust me. I developed a gluten sensitivity about 10 years ago but only figured it out 5 years ago. "Healthy" is "feels healthy" and "doesn't die young", that is pretty simple.
It sounds like you think this is about hypothetical and marginal health benefits but people have very acute and immediate physical (and cognitive) issues because of disrupted gut biome that are objectively improved by cutting out, in particular, gluten. This isn't just some weird obession.