Telegram would be a better choice as you can use multiple devices.
You can retrieve old images/docs
And it has an API for your bot that you can use to post content from anywhere.
The main restrictions are that you have to use the main device every 14 days and can only have ~4 linked devices.
https://faq.whatsapp.com/378279804439436/?helpref=faq_conten...
I’m trying to think of a rationale and really can’t. Any ideas?
They probably want to put a cap on how much data/CPU the sending device has to expend per message.
While WhatsApp simply uses instance on your phone via webapi on your desktop.