Enable / Disable indexing of child products in indices

[jakwinkler]

In the current version of ElasticSuite, all child products are added to Indices data.
I believe it is done here:

vendor/smile/elasticsuite/src/module-elasticsuite-catalog/Model/Product/Indexer/Fulltext/Datasource/AttributeData.php

in this section

$relationsByChildId = $this->resourceModel->loadChildrens($productIds, $storeId);

I've created a randomized catalog using my module:
https://github.com/qoliber/m2-catalog-generator

I've created 50 configurable product with 5 attributes, 5 options each, generating 3125 child options for configurable product.
Basically creating ~160k simple products.

With this number of options for products, CatalogSearch Index time is increasing with each configurable product, drastically.

Catalog Search index has been rebuilt successfully in 00:53:01

I understand why child products are indexed, but if they are not visible, they should be skipped form indexing.

But my general questions is: should be be indexed if they prolong the indexing process?