Regarding your second point, "you promised not to go down the slow path," I think that's true in most cases, but there is some VC money that's too easy to get, and the founder's don't really realize the promise they're making.
I feel like this is particularly true among YC startups, where it seems fashionable to take VC money right after demo day, regardless of other company factors (IE: traffic, growth, revenue, etc). The "invested in the team" argument works for YC and Start Fund, but it feels almost irresponsible for VC's to invest in first time entrepreneurs on the same premise. My sample size is tiny, but I think it puts far too many people in a situation they don't want to be in (which they'll realize X months down the road).
That last part is pretty controversial. Interested in other people's thoughts.