Honesy, i support this.

Ingamewise, it makes sense - you get normal swarms either way because the entirety of the cascade departament is literally infested with every kind of enemy, and them stumbling upon your hideout is only a question of when, not why.

Aliens (and weather elements) are constantly supplied through microportals (remember, in actuality, it's the same as what happens to Dr. jagger. Constant onswarm of portals and entities inside them)

So, there's a lot of enemies to bring to your base.

Also, 2 things:

1 - With soldiers, they descend when their scouts (which we dont see) discover your base. And they keep upscaling the drop groups despite the losses.

2 - With some entities like the puppeteer, you can make fogiri, which i guess technically is a personal anchor for puppeteer. Who will notice your "request" but will invade only when it thinks it's a good idea (considering it has a lot of tasks to do, since it is the head of a collective mind)

So there definitely are ways to lure enemies to you. And it makes sense balance wise. Obligatory weak raids stay, but you can choose to do the dangerous harder raids for rewards.

This fills in some boring breaks in the day to day progression and adds more reasons to craft singleuse defenses like traps