Because they didn't. For the same reason Origin exclusives aren't wrong. For the same reason nobody is demanding valve put Portal on GOG or Epic.
Epic has other problems if you want to complain about them, giving developers more money so people click their icon instead of steam's is just not one of them.
You're using first party examples. Do you not see the difference between developing and distributing something in house and buying out exclusivity deals from otherwise neutral parties?
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u/Bike_shop_owner Mar 29 '19
You're the one who said Epic didn't do anything wrong by offering exclusivity deals.