Considering how much we discovered in DA:I to be an outright lie, I am sure if my inquisitor had the choice, she'd go, just to see what all the fuss is about. I think the black city is like the temple in the Oasis, when the door was closed, the temple gave everyone a "bad feeling" to deter those not bold enough to go inside. Likewise I think the tales of the black city are just rantings from superstitious folk.
I wouldn't say it's ranting from superstitious folk, but you're right, how much we know actually about the Maker? Elves who pre-date Andrastians and the Chantry don't recognize such omni-potent deity and Corypheus states that the City was already black and magisters didn't recongize nor mention him as a deity - they had their own gods... Andraste had to burn, actually, in order to have the idea of the Maker valid in Tevinter Imperium.
There is a huge taboo when it comes to Black City, but there's no valid support in DA so far for the Maker to be an actual viable possibility - even Spirits don't recognize him (Justice never did in DA:A and I'm still not sure what to think when it comes to 'Divine' in the Fade).
We saw that magisters of old are true, Elven deities... and we saw and used Andraste's ashes (even though the entire temple was actually lying on lyrium). The only one who was sort of foreshadowing the Maker (and that is questionable, depending on interpretation) is Sandal actually in his prophecy.
Perhaps the Maker is just like Eru and the Western Wind and the Eagles in LotR... but so far, he's not showing actual signs of the existence at all.