Even if it is the case that long term these trends could hurt smaller Kickstarter projects, the problem lies with publishers, not people like Iga. No publisher would give him funding unless he could conclusively prove customers were willing to pay, and Kickstarter was the suggested and logical venue for it. Unfortunately, for many publishers this is going to wind up being a standard requirement for smaller-scale projects going forward.
Furthermore, he was very much up front with backers that was the case, so it's not like there was ever any dishonesty on his part, and the publisher only promised a portion of the necessary funds, not the entirety. The game was budgeted to require a minimum of $5m, and the publisher was willing to cover $4.5m, the rest had to come from crowd-funding (and to reiterate, the $4.5m would only come if the crowdfunding was successful). The key word there is minimum by the way, as the $5 million he would have gotten if he just made the initial $500k goal wouldn't have gotten him the funds for a Wii U port or the 25% larger castle he's now planning or Classic Mode, among all the other stretch goals they have planned.