So a topic has come up in a Facebook group a couple of times and I just personally experienced this on a group trip with Intrepid in Borneo.
So people going to Africa have asked whether they should buy a camera as they only have their phones. Of course, this is a personal choice. If the animal is far away, you aren't as likely to get good photos with a phone.
But there gave been statements made to the effect of, don't worry, people with cameras will share their photos. I feel that people should not expect or feel entitled to photos from those with good cameras and expensive lenses for free.
I was asked by some of my Borneo group to share because the guide point blank said if you have a phone you won't get good photos as the animals are high up in trees and further away. I would not for free. I've invested lots of money in my equipment and on occasion sell photos. Further, I've invested lots in the cost of travel to get the photos.
If people want to share, great, I just don't think people should expect it.