Why do Continent Map requests preclude you from finishing the Event? Store up enough goods beforehand, and negotiate your way through if you are too far ahead of your tech age on the map.
They don't unless you
(A) Refuse to ever change a strategy to suit the situation
(B) Have a niche strategy that ignores significant parts of the game
(which isn't the games fault - that's the player punishing themself not the game punishing the play style. It'd be like choosing to go through the entire game without FPs. Player choice not game design)
(C) Are significantly ahead on the map already for the age they're in. If you never rush ahead more then a single age on the map then you should never have a problem with the amount the events require
(D) You intend to never advance in the game.
(E) You're camping and don't want to move above your age in the map until you've stopped camping for a undetermined amount of time
(F) You don't want to buy goods off of other players and aren't prepared to trade up on the market the goods you do have so you can negotiate sectors
(G) ignore lvl'ing your fighting GBs
These problems mainly arise when players want to hyper lvl GBs prior to moving up an age instead of doing that inbetween going through the ages. It can also happen just through rushing one section of the game while ignoring other parts you need to grow (like aiming for all the map expansions even if they're out of your reach). It should be a reasonably easy fix as long as you haven't rushed so far ahead you're somewhere like Arctic Age map while still in Iron Age and can't fight them
Lvling your GBs before moving is a legit strategy, but it needs to be done within reason rather then doing it at the expense of every other aspect of the game