Agreed: if you're building a startup that simply recycles another successful company with hopes of being acquired -- and that is your predominant "business model" -- then you're in startup land for the wrong reasons. This isn't the dot-com-let's-build-something-that's-not-really-anything-and-IPO-or-sell-it-off-as-fast-as-we-can era anymore. Hint: look at the radical reduction in IPOs over the past 10 years (admittedly due largely to the onerous Sarbanes-Oxley regulations).
I'm already being asked by people what our exit strategy is. I'm like, "um, we haven't even launched yet -- the last thing I'm thinking about is exiting, I just want to build this thing and make it cool!"