So far the assumptions I'm seeing on this thread are that the federal government would cut corporate taxes if they could impose tariffs, and we could trust American business executives and Congress to not artificially raise tariffs to increase profit margin because a new aircraft manufacturer is going to pop up in someone's garage next week.
You're being intentionally obtuse. You know how the markets work: remove barriers to trade, and it flourishes. Artificially subsidized businesses like Airbus are barriers; it is essentially a monopoly because its losses are subsidized.
Tariffs remove that barrier to American industries; and let's not forget, we are concerned about American industries, not international industries. If we cannot agree on that, we have nothing more to say. American businesses should be American first, last and always.
Barring corruption, tariffs are not set up in favor of a specific business, they are intended to aid the entire industry.
Barriers gone; competition exists. Maybe a dude starts a business in his garage, maybe he doesn't. The point is, there is currently no way he can.