If they dont think they can take a case on standing, it doesnt really matter what they think of the rest of the case. Several courts have made it clear that the remedy is beyond their legal jurisdiction. That doesnt invalidate the claims.
There's been no lack of trying to gain standing, but you can't make a court take a case that they think is too hot for them to take. The requested remedy is part of the consideration for standing ... of which these courts don't want to get involved. All we see is that average citizens have no recourse for challenging an ineligible POTUS.