Well a human player isn't going to be so cooperative in letting you spam corporations in their territory, and they certainly won't do it for you. Tactics involving draining their economy with junker corporations are not going to work (and don't work that well since 3.13 against AIs either).
If you're playing against a mixture of human and AI players you've still got most of the normal corporation strategies open to you. Just keep your borders closed to any human with a corporation that you don't want. It's conceivable I might want a poweful corporation (say Sushi) even if it is foreign and in human hands.
Other point is you're actually going to face competition to found the good corporations - even at Deity the AI's never come close to stealing Sushi from me, but a human may well beeline it.