Why are they so keen on ruining e-mail?

I just received (another) abomination of an automated e-mail from Microsoft Outlook:

From:       Microsoft Outlook Reactions <no-reply@microsoft.com>
To:         Me
Subject:    Reaction Daily Digest - Tuesday, August 20, 2024


Microsoft Outlook


Profile Image


celebrate   [Name Removed] reacted to your message Mon 08/19/2024 09:01

(...)

I've had similar horrible experiences from Gmail, when a boomer decided to add a handful of reactions to an e-mail I was also a recipient of, and each reaction resulted in an e-mail being sent to me.