There's a whole cottage industry around WhatsApp that exists to provide tools and services to commodity brokers and traders, primarily for compliance and bulk messaging existing customers. Meta has nerfed bulk forwarding on their desktop app, and the industry moved to third party tools to work around this. The reality is, no-one is spamming, everyone is consenting to this, everyone understands the risks, but a lot of markets live on the WhatsApp network, and despite there being compliant chat solutions, the existing network effects keep the status quo. Prior to WhatsApp, the markets operated on Yahoo Messenger, and the only reason there was a move was because Yahoo shut it down in 2016.

If anyone from Meta is reading this - we've spoken to some of your managers and there's zero appetite from your side to address this market because it's too small. I would go out of my way to help you design this for free to solve the market need.

Meta could turn Whatsapp into the next Slack. I know a lot of businesses (especially international ones) that use it for team communication. It's so much better than Teams.

I guess they think it's a small market, or maybe you can't really monetize enterprise with ads and it's all they know how to do.