Don't think of it as defending a trillion dollar company, think of it as pushing back against a weak, badly-formed argument. When there are valid complaints to be made, bad arguments pollute the conversation and make it harder to focus the discussion on the root issues that actually need to be fixed to achieve the desired outcome.

If you don't like how Apple conducts their business, you really should want clear, open discussion of flaws in EU regulations that make them not effective against Apple, rather than threads full of blaming Apple for reacting to the incentives in front of them.