Not "everyone" -- if you're the owner of a successful ice cream brand who spent a decade grinding in the ice cream game, cashing out the brand equity and getting to live on a yacht might feel better.
If you think corporations are ultimate incarnation of pure greed, and consumers are clear minded rational actors bringing an honest offer to the table...well, start a business and see
And so the founder has a very valuable asset (a brand that is popular) but has also lost the thing he loved about the job (making a specialty product for discerning customers).
There is nothing unreasonable or greedy about exiting at that point. Let someone who wants to run a mature food business do so, and enjoy a well-deserved payout after years of hard work. All the discerning customers who care deeply about quality move on to the next thing, and normies who just like the brand name won't mind the changes.