this kind of falls into line with Reid Hoffman's famous quote:
"If you are not embarrassed by the first version of your product, you’ve launched too late."
I think these statements paint a wide brush and fail particularly for products whose main value prop is ease of use.
If your product's core value prop is UI/UX/ease of use, you cannot deliver that with a buggy half finished product. And if you cannot deliver the value you intend to provide, then you are shooting yourself in the foot, spooking users losing their trust in your ability to deliver.
Obviously each product is different, but I think specifically for this type, these methodologies should be omitted. Because the most likely case is that your customer is already solving the problem with a "brick", whether that is your competition or a home made solution that they have created. Handing them another brick will not suffice.