Sure, I understand why most physicists accept [itex]\Lambda[/itex]CDM. A lot of work by a lot of people has gone into integrating DM, DE, & inflaton into the standard model. Meanwhile the "other side" only has a handful of people working on it, so I'm also not terribly surprised that similar grand cosmological integrations have not yet arrived for MOND. But I also know that theoreticians can explain just about anything given enough time.You've proven that a model DOES exist which explains the observations. This is a highly non-trivial statement. It's easy to say that a different physics could explain all of the observations without DM. However, as I and others have said, nobody has been able to come up with such a different physics. To sum up:
(1) GR + dark matter explains a huge body of different observations remarkably well.
(2) No other model exists which even comes close.
(3) Most physicists therefore accept this model and are searching for direct evidence of dark matter.
That's why I'm not worried. Eventually DM & DE will be cut down by Friar Occam's razor.