Standard cosmology is a consensus based on interpretations of spotty data and imperfect methods, therefore standard cosmology itself is a bit "fringe". It natural given the context. Alternatives to standard cosmology will also be "fringy" for the same reasons, and possibly more reasons too.

Dismissing all alternatives to standard cosmology as "fringe" is not helpful when standard cosmonlogy itself is "fringe".

Granted, there will be really far out there alt theories. The uncertainty of the context will bring out wild hypotheses. Figuring out who's a charlatan and who is in the ballpark can be difficult under these circumstances, but we have to.