Well, it would never happen because they are also not likely adding full retail markup of individual accessories to the price of the bundle. Hence, in the bundle those accessories most likely don't cost $115. Rather they are a smaller part of the total price. (You're getting a discount on their regular price as so the total price can be less as an incentive to get the system.
Nintendo decided on the maximum price they wanted to charge for the console bundle ($299/€299) before they decided what would be in the bundle and how much everything would need to cost in production. Then they fitted the accessories in despite their higher separate retail value. (It's quite a balancing act they needed to do.)
So, taking out the accessories would not result in a price drop of the full separate retail value of the accessories. Rather I'd imagine it could be somewhere between $210 and $225. That's a bundle value of the accessories of $75-90. Which is a 22-35% discount on them compared to the regular retail price. (Much more plausible than the full bundle offering a discount of more than 50% of the regular retail price of the accessories.)
The price of this version is even slightly higher than that to properly discourage first time owners to get this bundle. (They want to maximise the amount of Switch owners with at least one dock in their household.)
It's all about managing demand.
Same goes for the price of the dock. Even if it has an higher than normal margin (something I'm, contrary to a lot of other people, not convinced about) they wouldn't quickly lower the price as it would require them to make more docks and AC adapters because of the higher demand. It's again about balancing: the costs of production, distribution, etc. and the revenue made from selling it.
In other words they want people to flinch at the idea of getting a second one – to a certain specific degree. ;-)