Agreed. He should have read PG's YC Numbers [1]. The overwhelming majority of value in YC's portfolio comes from the top 10% all of which have likely turned down numerous acquisition offers. YC would much rather an IPO or late stage acquisition vs. acqui-hire liquidity event.
Yes, but the company doesn't necessarily know whether it's going to be in that top 10% when acqui-hire offers occur. They usually occur on the upward trajectory of a company. So most investors would rather the company roll the dice on a bigger exit later than "settle" for the acqui-hire now.
[1] http://ycombinator.com/nums.html