The causal set folks are already outsiders that go against the broad consensus of HEP-Th. I grew up scientifically in an environment that was actively challenging mainstream consensus. Sometimes correctly (e.g. low energy susy), sometimes not. If those folk can't find something redeeming in what you do you should stop and listen.

Also, yes scientific consensus at the cutting edge changes over time. That's the nature of science. But I challenge you to find a single example where the consensus was "there is nothing of substance here" and it turned out to be wrong. Not all forms of challenging consensus are equivalent.

At the end of the day though, this is HEP. Itt doesn't matter. Worst that can happen is that you waste your time learning some neat math.