People on this sub react to memes that criticize both parties without explicitly mentioning they still vote for Biden, the way that most Westerners react to somebody criticizing Israel without explicitly mentioning they condemn the October 7th attack.
On Android you can just install another keyboard if your current one doesn’t have a setting for this.
If I had to guess a business case, I’d say that predictive text as a feature gives you a “legitimate reason” to send your typing data to Google or whoever to train the prediction engine, and they want that data.