If you want send messages to anyone without adding to your contact list you can it. They won’t see your profile photo although you sent messages if you selected your privacy settings only for your contacts.
1. Copy without space the number that you will send message. You should paste on notes and copy again after editing.
And it’s should be start international code.
For example 1734……… for US phone numbers.
2. Open the web any web browser on your phone. (Safari, Chorome or another one)
3. And you will paste the number to search area on web browser after wa.me/ and touch to go.
For example : wa.me/1734………….
4. And accept that popup for open the message’s page on WhatsApp application.
5. You can send message now without show your profile photo.